/*!
 * jScrollPane - v2.0.0beta5 - 2010-09-18
 * http://jscrollpane.kelvinluck.com/
 *
 * Copyright (c) 2010 Kelvin Luck
 * Dual licensed under the MIT and GPL licenses.
 */

// Script: jScrollPane - cross browser customisable scrollbars
//
// *Version: 2.0.0beta5, Last updated: 2010-09-18*
//
// Project Home - http://jscrollpane.kelvinluck.com/
// GitHub       - http://github.com/vitch/jScrollPane
// Source       - http://github.com/vitch/jScrollPane/raw/master/script/jquery.jscrollpane.js
// (Minified)   - http://github.com/vitch/jScrollPane/raw/master/script/jquery.jscrollpane.min.js
//
// About: License
//
// Copyright (c) 2010 Kelvin Luck
// Dual licensed under the MIT or GPL Version 2 licenses.
// http://jscrollpane.kelvinluck.com/MIT-LICENSE.txt
// http://jscrollpane.kelvinluck.com/GPL-LICENSE.txt
//
// About: Examples
//
// All examples and demos are available through the jScrollPane example site at:
// http://jscrollpane.kelvinluck.com/
//
// About: Support and Testing
//
// This plugin is tested on the browsers below and has been found to work reliably on them. If you run
// into a problem on one of the supported browsers then please visit the support section on the jScrollPane
// website (http://jscrollpane.kelvinluck.com/) for more information on getting support. You are also
// welcome to fork the project on GitHub if you can contribute a fix for a given issue. 
//
// jQuery Versions - 1.4.2
// Browsers Tested - Firefox 3.6.8, Safari 5, Opera 10.6, Chrome 5.0, IE 6, 7, 8
//
// About: Release History
//
// 2.0.0beta5 - (in progess)
// 2.0.0beta4 - (2010-09-17) clickOnTrack support, bug fixes
// 2.0.0beta3 - (2010-08-27) Horizontal mousewheel, mwheelIntent, keyboard support, bug fixes
// 2.0.0beta2 - (2010-08-21) Bug fixes
// 2.0.0beta1 - (2010-08-17) Rewrite to follow modern best practices and enable horizontal scrolling, initially hidden
//                           elements and dynamically sized elements.
// 1.x - (2006-12-31 - 2010-07-31) Initial version, hosted at googlecode, deprecated

(function($,window,undefined){

    $.fn.jScrollPane = function(settings)
    {
        // JScrollPane "class" - public methods are available through $('selector').data('jsp')
        function JScrollPane(elem, s)
        {

            var settings, jsp = this, pane, paneWidth, paneHeight, container, contentWidth, contentHeight,
                percentInViewH, percentInViewV, isScrollableV, isScrollableH, verticalDrag, dragMaxY,
                verticalDragPosition, horizontalDrag, dragMaxX, horizontalDragPosition,
                verticalBar, verticalTrack, scrollbarWidth, verticalTrackHeight, verticalDragHeight, arrowUp, arrowDown,
                horizontalBar, horizontalTrack, horizontalTrackWidth, horizontalDragWidth, arrowLeft, arrowRight,
                reinitialiseInterval, originalPadding, originalPaddingTotalWidth, previousPaneWidth,
                wasAtTop, preload_distance = true, wasAtLeft = true, wasAtBottom = false, wasAtRight = false,
                mwEvent = $.fn.mwheelIntent ? 'mwheelIntent.jsp' : 'mousewheel.jsp';
                
            
            originalPadding = elem.css('paddingTop') + ' ' +
                                elem.css('paddingRight') + ' ' +
                                elem.css('paddingBottom') + ' ' +
                                elem.css('paddingLeft');
            originalPaddingTotalWidth = (parseInt(elem.css('paddingLeft')) || 0) +
                                        (parseInt(elem.css('paddingRight')) || 0);

            initialise(s);

            function initialise(s)
            {

                var clonedElem, tempWrapper, /*firstChild, lastChild, */isMaintainingPositon, lastContentX, lastContentY,
                        hasContainingSpaceChanged;

                settings = s;

                if (pane == undefined) {

                    elem.css(
                        {
                            'padding': 0
                        }
                    );
                    // TODO: Deal with where width/ height is 0 as it probably means the element is hidden and we should
                    // come back to it later and check once it is unhidden...
                    paneWidth = elem.innerWidth() + originalPaddingTotalWidth;
                    paneHeight = elem.innerHeight();

                    elem.width(paneWidth);
                    
                    pane = $('<div class="jspPane" />').wrap(
                        $('<div class="jspContainer" />')
                            .css({
                                'width': paneWidth + 'px',
                                'height': paneHeight + 'px'
                            }
                        )
                    );

                    elem.wrapInner(pane.parent());
                    // Need to get the vars after being added to the document, otherwise they reference weird
                    // disconnected orphan elements...
                    container = elem.find('>.jspContainer');
                    pane = container.find('>.jspPane');
                    pane.css('padding', originalPadding);

                    /*
                    // Move any margins from the first and last children up to the container so they can still
                    // collapse with neighbouring elements as they would before jScrollPane 
                    firstChild = pane.find(':first-child');
                    lastChild = pane.find(':last-child');
                    elem.css(
                        {
                            'margin-top': firstChild.css('margin-top'),
                            'margin-bottom': lastChild.css('margin-bottom')
                        }
                    );
                    firstChild.css('margin-top', 0);
                    lastChild.css('margin-bottom', 0);
                    */
                } else {

                    elem.css('width', null);

                    hasContainingSpaceChanged = elem.outerWidth() + originalPaddingTotalWidth != paneWidth || elem.outerHeight() != paneHeight;

                    if (hasContainingSpaceChanged) {
                        paneWidth = elem.innerWidth() + originalPaddingTotalWidth;
                        paneHeight = elem.innerHeight();
                        container.css({
                            'width': paneWidth + 'px',
                            'height': paneHeight + 'px'
                        });
                    }

                    previousPaneWidth = pane.innerWidth();

                    if (!hasContainingSpaceChanged && pane.outerWidth() == contentWidth && pane.outerHeight() == contentHeight) {
                        // Nothing has changed since we last initialised
                        if (isScrollableH || isScrollableV) { // If we had already set a width then re-set it
                            pane.css('width', previousPaneWidth + 'px');
                            elem.css('width', (previousPaneWidth + originalPaddingTotalWidth) + 'px');
                        }
                        // Then abort...
                        return;
                    }
                    
                    pane.css('width', null);
                    elem.css('width', (paneWidth ) + 'px');

                    container.find('>.jspVerticalBar,>.jspHorizontalBar').remove().end();
                }

                // Unfortunately it isn't that easy to find out the width of the element as it will always report the
                // width as allowed by its container, regardless of overflow settings.
                // A cunning workaround is to clone the element, set its position to absolute and place it in a narrow
                // container. Now it will push outwards to its maxium real width...
                clonedElem = pane.clone().css('position', 'absolute');
                tempWrapper = $('<div style="width:1px; position: relative;" />').append(clonedElem);
                $('body').append(tempWrapper);
                contentWidth = Math.max(pane.outerWidth(), clonedElem.outerWidth());
                tempWrapper.remove();
                
                contentHeight = pane.outerHeight();
                percentInViewH = contentWidth / paneWidth;
                percentInViewV = contentHeight / paneHeight;
                isScrollableV = percentInViewV > 1;

                isScrollableH = percentInViewH > 1;

                //console.log(paneWidth, paneHeight, contentWidth, contentHeight, percentInViewH, percentInViewV, isScrollableH, isScrollableV);
                preload_distance = settings.preload_distance ? settings.preload_distance : 200;
                
                if (!(isScrollableH || isScrollableV)) {
                    elem.removeClass('jspScrollable');
                    pane.css({
                        'top': 0,
                        'width': container.width() - originalPaddingTotalWidth
                    });
                    removeMousewheel();
                    removeFocusHandler();
                    removeKeyboardNav();
                    removeClickOnTrack();
                    removeTouch();
                    unhijackInternalLinks();
                } else {
                    elem.addClass('jspScrollable');

                    isMaintainingPositon = settings.maintainPosition && (verticalDragPosition || horizontalDragPosition);
                    if (isMaintainingPositon) {
                        lastContentX = contentPositionX();
                        lastContentY = contentPositionY();
                    }

                    initialiseVerticalScroll();
                    initialiseHorizontalScroll();
                    resizeScrollbars();

                    if (isMaintainingPositon) {
                        scrollToX(lastContentX);
                        scrollToY(lastContentY);
                    }

                    initFocusHandler();
                    initMousewheel();
                    initTouch();
                    
                    if (settings.enableKeyboardNavigation) {
                        initKeyboardNav();
                    }
                    if (settings.clickOnTrack) {
                        initClickOnTrack();
                    }
                    
                    observeHash();
                    if (settings.hijackInternalLinks) {
                        hijackInternalLinks();
                    }
                }

                if (settings.autoReinitialise && !reinitialiseInterval) {
                    reinitialiseInterval = setInterval(
                        function()
                        {
                            initialise(settings);
                        },
                        settings.autoReinitialiseDelay
                    );
                } else if (!settings.autoReinitialise && reinitialiseInterval) {
                    clearInterval(reinitialiseInterval);
                }

                elem.trigger('jsp-initialised', [isScrollableH || isScrollableV]);
            }

            function initialiseVerticalScroll()
            {
                if (isScrollableV) {

                    container.append(
                        $('<div class="jspVerticalBar" />').append(
                            $('<div class="jspCap jspCapTop" />'),
                            $('<div class="jspTrack" />').append(
                                $('<div class="jspDrag" />').append(
                                    $('<div class="jspDragTop" />'),
                                    $('<div class="jspDragBottom" />')
                                )
                            ),
                            $('<div class="jspCap jspCapBottom" />')
                        )
                    );

                    verticalBar = container.find('>.jspVerticalBar');
                    verticalTrack = verticalBar.find('>.jspTrack');
                    verticalDrag = verticalTrack.find('>.jspDrag');

                    if (settings.showArrows) {
                        arrowUp = $('<a class="jspArrow jspArrowUp" />').bind(
                            'mousedown.jsp', getArrowScroll(0, -1)
                        ).bind('click.jsp', nil);
                        arrowDown = $('<a class="jspArrow jspArrowDown" />').bind(
                            'mousedown.jsp', getArrowScroll(0, 1)
                        ).bind('click.jsp', nil);
                        if (settings.arrowScrollOnHover) {
                            arrowUp.bind('mouseover.jsp', getArrowScroll(0, -1, arrowUp));
                            arrowDown.bind('mouseover.jsp', getArrowScroll(0, 1, arrowDown));
                        }

                        appendArrows(verticalTrack, settings.verticalArrowPositions, arrowUp, arrowDown);
                    }

                    verticalTrackHeight = paneHeight;
                    container.find('>.jspVerticalBar>.jspCap:visible,>.jspVerticalBar>.jspArrow').each(
                        function()
                        {
                            verticalTrackHeight -= $(this).outerHeight();
                        }
                    );


                    verticalDrag.hover(
                        function()
                        {
                            verticalDrag.addClass('jspHover');
                        },
                        function()
                        {
                            verticalDrag.removeClass('jspHover');
                        }
                    ).bind(
                        'mousedown.jsp',
                        function(e)
                        {
                            // Stop IE from allowing text selection
                            $('html').bind('dragstart.jsp selectstart.jsp', function() { return false; });

                            verticalDrag.addClass('jspActive');

                            var startY = e.pageY - verticalDrag.position().top;

                            $('html').bind(
                                'mousemove.jsp',
                                function(e)
                                {
                                    positionDragY(e.pageY - startY, false);
                                }
                            ).bind('mouseup.jsp mouseleave.jsp', cancelDrag);
                            return false;
                        }
                    );
                    sizeVerticalScrollbar();
                }
            }

            function sizeVerticalScrollbar()
            {
                verticalTrack.height(verticalTrackHeight + 'px');
                verticalDragPosition = 0;
                scrollbarWidth = settings.verticalGutter + verticalTrack.outerWidth();

                // Make the pane thinner to allow for the vertical scrollbar
                pane.width(paneWidth - scrollbarWidth - originalPaddingTotalWidth);

                // Add margin to the left of the pane if scrollbars are on that side (to position
                // the scrollbar on the left or right set it's left or right property in CSS)
                if (verticalBar.position().left == 0) {
                    pane.css('margin-left', scrollbarWidth + 'px');
                }
            }

            function initialiseHorizontalScroll()
            {
                if (isScrollableH) {

                    container.append(
                        $('<div class="jspHorizontalBar" />').append(
                            $('<div class="jspCap jspCapLeft" />'),
                            $('<div class="jspTrack" />').append(
                                $('<div class="jspDrag" />').append(
                                    $('<div class="jspDragLeft" />'),
                                    $('<div class="jspDragRight" />')
                                )
                            ),
                            $('<div class="jspCap jspCapRight" />')
                        )
                    );

                    horizontalBar = container.find('>.jspHorizontalBar');
                    horizontalTrack = horizontalBar.find('>.jspTrack');
                    horizontalDrag = horizontalTrack.find('>.jspDrag');

                    if (settings.showArrows) {
                        arrowLeft = $('<a class="jspArrow jspArrowLeft" />').bind(
                            'mousedown.jsp', getArrowScroll(-1, 0)
                        ).bind('click.jsp', nil);
                        arrowRight = $('<a class="jspArrow jspArrowRight" />').bind(
                            'mousedown.jsp', getArrowScroll(1, 0)
                        ).bind('click.jsp', nil);
                        if (settings.arrowScrollOnHover) {
                            arrowLeft.bind('mouseover.jsp', getArrowScroll(-1, 0, arrowLeft));
                            arrowRight.bind('mouseover.jsp', getArrowScroll(1, 0, arrowRight));
                        }
                        appendArrows(horizontalTrack, settings.horizontalArrowPositions, arrowLeft, arrowRight);
                    }

                    horizontalDrag.hover(
                        function()
                        {
                            horizontalDrag.addClass('jspHover');
                        },
                        function()
                        {
                            horizontalDrag.removeClass('jspHover');
                        }
                    ).bind(
                        'mousedown.jsp',
                        function(e)
                        {
                            // Stop IE from allowing text selection
                            $('html').bind('dragstart.jsp selectstart.jsp', function() { return false; });

                            horizontalDrag.addClass('jspActive');

                            var startX = e.pageX - horizontalDrag.position().left;

                            $('html').bind(
                                'mousemove.jsp',
                                function(e)
                                {
                                    positionDragX(e.pageX - startX, false);
                                }
                            ).bind('mouseup.jsp mouseleave.jsp', cancelDrag);
                            return false;
                        }
                    );
                    horizontalTrackWidth = container.innerWidth();
                    sizeHorizontalScrollbar();
                } else {
                    // no horizontal scroll
                }
            }

            function sizeHorizontalScrollbar()
            {

                container.find('>.jspHorizontalBar>.jspCap:visible,>.jspHorizontalBar>.jspArrow').each(
                    function()
                    {
                        horizontalTrackWidth -= $(this).outerWidth();
                    }
                );

                horizontalTrack.width(horizontalTrackWidth + 'px');
                horizontalDragPosition = 0;
            }

            function resizeScrollbars()
            {
                if (isScrollableH && isScrollableV) {
                    var horizontalTrackHeight = horizontalTrack.outerHeight(),
                        verticalTrackWidth = verticalTrack.outerWidth();
                    verticalTrackHeight -= horizontalTrackHeight;
                    $(horizontalBar).find('>.jspCap:visible,>.jspArrow').each(
                        function()
                        {
                            horizontalTrackWidth += $(this).outerWidth();
                        }
                    );
                    horizontalTrackWidth -= verticalTrackWidth;
                    paneHeight -= verticalTrackWidth;
                    paneWidth -= horizontalTrackHeight;
                    horizontalTrack.parent().append(
                        $('<div class="jspCorner" />').css('width', horizontalTrackHeight + 'px')
                    );
                    sizeVerticalScrollbar();
                    sizeHorizontalScrollbar();
                }
                // reflow content
                if (isScrollableH) {
                    pane.width((container.outerWidth() - originalPaddingTotalWidth) + 'px');
                }
                contentHeight = pane.outerHeight();
                percentInViewV = contentHeight / paneHeight;

                if (isScrollableH) {
                    horizontalDragWidth = 1 / percentInViewH * horizontalTrackWidth;
                    if (horizontalDragWidth > settings.horizontalDragMaxWidth) {
                        horizontalDragWidth = settings.horizontalDragMaxWidth;
                    } else if (horizontalDragWidth < settings.horizontalDragMinWidth) {
                        horizontalDragWidth = settings.horizontalDragMinWidth;
                    }
                    horizontalDrag.width(horizontalDragWidth + 'px');
                    dragMaxX = horizontalTrackWidth - horizontalDragWidth;
                    _positionDragX(horizontalDragPosition); // To update the state for the arrow buttons
                }
                if (isScrollableV) {
                    verticalDragHeight = 1 / percentInViewV * verticalTrackHeight;
                    if (verticalDragHeight > settings.verticalDragMaxHeight) {
                        verticalDragHeight = settings.verticalDragMaxHeight;
                    } else if (verticalDragHeight < settings.verticalDragMinHeight) {
                        verticalDragHeight = settings.verticalDragMinHeight;
                    }
                    verticalDrag.height(verticalDragHeight + 'px');
                    dragMaxY = verticalTrackHeight - verticalDragHeight;
                    _positionDragY(verticalDragPosition); // To update the state for the arrow buttons
                }
            }

            function appendArrows(ele, p, a1, a2)
            {
                var p1 = "before", p2 = "after", aTemp;
                
                // Sniff for mac... Is there a better way to determine whether the arrows would naturally appear
                // at the top or the bottom of the bar?
                if (p == "os") {
                    p = /Mac/.test(navigator.platform) ? "after" : "split";
                }
                if (p == p1) {
                    p2 = p;
                } else if (p == p2) {
                    p1 = p;
                    aTemp = a1;
                    a1 = a2;
                    a2 = aTemp;
                }

                ele[p1](a1)[p2](a2);
            }

            function getArrowScroll(dirX, dirY, ele) {
                return function()
                {
                    arrowScroll(dirX, dirY, this, ele);
                    this.blur();
                    return false;
                }
            }

            function arrowScroll(dirX, dirY, arrow, ele)
            {
                arrow = $(arrow).addClass('jspActive');

                var eve, doScroll = function()
                    {
                        if (dirX != 0) {
                            positionDragX(horizontalDragPosition + dirX * settings.arrowButtonSpeed, false);
                        }
                        if (dirY != 0) {
                            positionDragY(verticalDragPosition + dirY * settings.arrowButtonSpeed, false);
                        }
                    },
                    scrollInt = setInterval(doScroll, settings.arrowRepeatFreq);

                doScroll();

                eve = ele == undefined ? 'mouseup.jsp' : 'mouseout.jsp';
                ele = ele || $('html');
                ele.bind(
                    eve,
                    function()
                    {
                        arrow.removeClass('jspActive');
                        clearInterval(scrollInt);
                        ele.unbind(eve);
                    }
                );
            }

            function initClickOnTrack()
            {
                removeClickOnTrack();
                if (isScrollableV) {
                    verticalTrack.bind(
                        'mousedown.jsp',
                        function(e)
                        {
                            if (e.originalTarget == undefined || e.originalTarget == e.currentTarget) {
                                var clickedTrack = $(this),
                                    scrollInt = setInterval(
                                        function()
                                        {
                                            var offset = clickedTrack.offset(), pos = e.pageY - offset.top;
                                            if (verticalDragPosition + verticalDragHeight < pos) {
                                                positionDragY(verticalDragPosition + settings.trackClickSpeed);
                                            } else if (pos < verticalDragPosition) {
                                                positionDragY(verticalDragPosition - settings.trackClickSpeed);
                                            } else {
                                                cancelClick();
                                            }
                                        },
                                        settings.trackClickRepeatFreq
                                    ),
                                    cancelClick = function()
                                    {
                                        scrollInt && clearInterval(scrollInt);
                                        scrollInt = null;
                                        $(document).unbind('mouseup.jsp', cancelClick);
                                    };
                                $(document).bind('mouseup.jsp', cancelClick);
                                return false;
                            }
                        }
                    );
                }
                if (isScrollableH) {
                    horizontalTrack.bind(
                        'mousedown.jsp',
                        function(e)
                        {
                            if (e.originalTarget == undefined || e.originalTarget == e.currentTarget) {
                                var clickedTrack = $(this),
                                    scrollInt = setInterval(
                                        function()
                                        {
                                            var offset = clickedTrack.offset(), pos = e.pageX - offset.left;
                                            if (horizontalDragPosition + horizontalDragWidth < pos) {
                                                positionDragX(horizontalDragPosition + settings.trackClickSpeed);
                                            } else if (pos < horizontalDragPosition) {
                                                positionDragX(horizontalDragPosition - settings.trackClickSpeed);
                                            } else {
                                                cancelClick();
                                            }
                                        },
                                        settings.trackClickRepeatFreq
                                    ),
                                    cancelClick = function()
                                    {
                                        scrollInt && clearInterval(scrollInt);
                                        scrollInt = null;
                                        $(document).unbind('mouseup.jsp', cancelClick);
                                    };
                                $(document).bind('mouseup.jsp', cancelClick);
                                return false;
                            }
                        }
                    );
                }
            }

            function removeClickOnTrack()
            {
                horizontalTrack && horizontalTrack.unbind('mousedown.jsp');
                verticalTrack && verticalTrack.unbind('mousedown.jsp');
            }

            function cancelDrag()
            {
                $('html').unbind('dragstart.jsp selectstart.jsp mousemove.jsp mouseup.jsp mouseleave.jsp');

                verticalDrag && verticalDrag.removeClass('jspActive');
                horizontalDrag && horizontalDrag.removeClass('jspActive');
            }

            function positionDragY(destY, animate)
            {
                if (!isScrollableV) {
                    return;
                }
                if (destY < 0) {
                    destY = 0;
                } else if (destY > dragMaxY) {
                    destY = dragMaxY;
                }

                // can't just check if(animate) because false is a valid value that could be passed in...
                if (animate == undefined) {
                    animate = settings.animateScroll;
                }
                if (animate) {
                    jsp.animate(verticalDrag, 'top', destY, _positionDragY);
                } else {
                    verticalDrag.css('top', destY);
                    _positionDragY(destY);
                }

            }

            function _positionDragY(destY)
            {
                if (destY == undefined) {
                    destY = verticalDrag.position().top;
                }

                container.scrollTop(0);
                verticalDragPosition = destY;

                var isAtTop = verticalDragPosition == 0,
                    isAtBottom = verticalDragPosition == dragMaxY,
                    percentScrolled = destY/ dragMaxY,
                    destTop = -percentScrolled * (contentHeight - paneHeight);

                if (wasAtTop != isAtTop || wasAtBottom != isAtBottom) {
                    wasAtTop = isAtTop;
                    wasAtBottom = isAtBottom;
                    elem.trigger('jsp-arrow-change', [wasAtTop, wasAtBottom, wasAtLeft, wasAtRight]);
                }
                
                updateVerticalArrows(isAtTop, isAtBottom);
                pane.css('top', destTop);
                elem.trigger('jsp-scroll-y', [-destTop, isAtTop, isAtBottom]);
                
                if(destY >= dragMaxY - preload_distance) {
                    //getMoreHistory("scroll");
                }
            }

            function positionDragX(destX, animate)
            {
                if (!isScrollableH) {
                    return;
                }
                if (destX < 0) {
                    destX = 0;
                } else if (destX > dragMaxX) {
                    destX = dragMaxX;
                }

                if (animate == undefined) {
                    animate = settings.animateScroll;
                }
                if (animate) {
                    jsp.animate(horizontalDrag, 'left', destX,  _positionDragX);
                } else {
                    horizontalDrag.css('left', destX);
                    _positionDragX(destX);
                }
            }

            function _positionDragX(destX)
            {
                if (destX == undefined) {
                    destX = horizontalDrag.position().left;
                }

                container.scrollTop(0);
                horizontalDragPosition = destX;

                var isAtLeft = horizontalDragPosition == 0,
                    isAtRight = horizontalDragPosition == dragMaxX,
                    percentScrolled = destX / dragMaxX,
                    destLeft = -percentScrolled * (contentWidth - paneWidth);

                if (wasAtLeft != isAtLeft || wasAtRight != isAtRight) {
                    wasAtLeft = isAtLeft;
                    wasAtRight = isAtRight;
                    elem.trigger('jsp-arrow-change', [wasAtTop, wasAtBottom, wasAtLeft, wasAtRight]);
                }
                
                updateHorizontalArrows(isAtLeft, isAtRight);
                pane.css('left', destLeft);
                elem.trigger('jsp-scroll-x', [-destLeft, isAtLeft, isAtRight]);
                
                if(destX >= dragMaxX - preload_distance) {
                    //getMoreHistory();
                }
            }

            function updateVerticalArrows(isAtTop, isAtBottom)
            {
                if (settings.showArrows) {
                    arrowUp[isAtTop ? 'addClass' : 'removeClass']('jspDisabled');
                    arrowDown[isAtBottom ? 'addClass' : 'removeClass']('jspDisabled');
                }
            }

            function updateHorizontalArrows(isAtLeft, isAtRight)
            {
                if (settings.showArrows) {
                    arrowLeft[isAtLeft ? 'addClass' : 'removeClass']('jspDisabled');
                    arrowRight[isAtRight ? 'addClass' : 'removeClass']('jspDisabled');
                }
            }

            function scrollToY(destY, animate)
            {
                var percentScrolled = destY / (contentHeight - paneHeight);
                positionDragY(percentScrolled * dragMaxY, animate);
            }

            function scrollToX(destX, animate)
            {
                var percentScrolled = destX / (contentWidth - paneWidth);
                positionDragX(percentScrolled * dragMaxX, animate);
            }

            function scrollToElement(ele, stickToTop, animate)
            {
                var e, eleHeight, eleTop = 0, viewportTop, maxVisibleEleTop, destY;

                // Legal hash values aren't necessarily legal jQuery selectors so we need to catch any
                // errors from the lookup...
                try {
                    e = $(ele);
                } catch (err) {
                    return;
                }
                eleHeight = e.outerHeight();

                container.scrollTop(0);
                
                // loop through parents adding the offset top of any elements that are relatively positioned between
                // the focused element and the jspPane so we can get the true distance from the top
                // of the focused element to the top of the scrollpane...
                while (!e.is('.jspPane')) {
                    eleTop += e.position().top;
                    e = e.offsetParent();
                    if (/^body|html$/i.test(e[0].nodeName)) {
                        // we ended up too high in the document structure. Quit!
                        return;
                    }
                }


                viewportTop = contentPositionY();
                maxVisibleEleTop = viewportTop + paneHeight;
                if (eleTop < viewportTop || stickToTop) { // element is above viewport
                    destY = eleTop - settings.verticalGutter;
                } else if (eleTop + eleHeight > maxVisibleEleTop) { // element is below viewport
                    destY = eleTop - paneHeight + eleHeight + settings.verticalGutter;
                }
                if (destY) {
                    scrollToY(destY, animate);
                }
                // TODO: Implement automatic horizontal scrolling?
            }

            function contentPositionX()
            {
                return -pane.position().left;
            }

            function contentPositionY()
            {
                return -pane.position().top;
            }

            function initMousewheel()
            {
                container.unbind(mwEvent).bind(
                    mwEvent,
                    function (event, delta, deltaX, deltaY) {
                        var dX = horizontalDragPosition, dY = verticalDragPosition;
                        positionDragX(horizontalDragPosition + deltaX * settings.mouseWheelSpeed, false);
                        positionDragY(verticalDragPosition - deltaY * settings.mouseWheelSpeed, false);
                        // return true if there was no movement so rest of screen can scroll
                        return dX == horizontalDragPosition && dY == verticalDragPosition;
                    }
                );
            }

            function removeMousewheel()
            {
                container.unbind(mwEvent);
            }
            
            function initTouch()
            {
                removeTouch();
                var pos = {
                x: 0,
                y: 0
                };
                
            container
                .bind(
                    'simpletouchstart.jsp',
                    function (event) {
                    pos.x = event.pageX;
                    pos.y = event.pageY;
                    }
                )
                .bind('simpletouchmove.jsp', function(event){
                    var dX = horizontalDragPosition, dY = verticalDragPosition, nY, nX;
                    if(verticalDrag && verticalDrag[0] === event.target){
                        nY = (pos.y - event.pageY) * - 1;
                    } else if(horizontalDrag && horizontalDrag[0] === event.target){
                        nX = (pos.x - event.pageX) * - 1;
                    } else {
                        nY = pos.y - event.pageY;
                        nX = pos.x - event.pageX;
                    }
                    if(nX !== undefined){
                        positionDragX(horizontalDragPosition + nX, false);
                    }
                    if(nY !== undefined){
                        positionDragY(verticalDragPosition + nY, false);
                    }
                    pos.x = event.pageX;
                    pos.y = event.pageY;
                    return dX == horizontalDragPosition && dY == verticalDragPosition;
                });
            }
                
            function removeTouch()
            {
                container.unbind('simpletouchstart.jsp simpletouchend.jsp simpletouchmove.jsp');
            }
            

            function nil()
            {
                return false;
            }

            function initFocusHandler()
            {
                pane.unbind('focusin.jsp').bind(
                    'focusin.jsp',
                    function(e)
                    {
                        if(e.target === pane[0]){return;}
                        scrollToElement(e.target, false);
                    }
                );
            }

            function removeFocusHandler()
            {

                pane.unbind('focusin.jsp');
            }
            
            function initKeyboardNav()
            {
                var pressed, pressedTimer;
                elem.attr('tabindex', 0)
                    .unbind('keydown.jsp')
                    .bind(
                        'keydown.jsp',
                        function(e)
                        {
                            if(e.target !== elem[0]){
                                return;
                            }
                            var dX = horizontalDragPosition, dY = verticalDragPosition, step = pressed ? 2 : 16;
                            switch(e.keyCode) {
                                case 40: // down
                                    positionDragY(verticalDragPosition + step, false);
                                    break;
                                case 38: // up
                                    positionDragY(verticalDragPosition - step, false);
                                    break;
                                case 34: // page down
                                case 32: // space
                                    scrollToY(contentPositionY() + Math.max(32, paneHeight) - 16);
                                    break;
                                case 33: // page up
                                    scrollToY(contentPositionY() - paneHeight + 16);
                                    break;
                                case 35: // end
                                    scrollToY(contentHeight - paneHeight);
                                    break;
                                case 36: // home
                                    scrollToY(0);
                                    break;
                                case 39: // right
                                    positionDragX(horizontalDragPosition + step, false);
                                    break;
                                case 37: // left
                                    positionDragX(horizontalDragPosition - step, false);
                                    break;
                            }

                            if( !(dX == horizontalDragPosition && dY == verticalDragPosition) ){
                                pressed = true;
                                clearTimeout(pressedTimer);
                                pressedTimer = setTimeout(function(){
                                    pressed = false;
                                }, 260);
                                return false;
                            }
                        }
                    );
                if(settings.hideFocus) {
                    elem.css('outline', 'none');
                    if('hideFocus' in container[0]){
                        elem.attr('hideFocus', true);
                    }
                } else {
                    elem.css('outline', '');
                    if('hideFocus' in container[0]){
                        elem.attr('hideFocus', false);
                    }
                }
            }
            
            function removeKeyboardNav()
            {
                elem.attr('tabindex', '-1')
                    .removeAttr('tabindex')
                    .unbind('keydown.jsp');
            }

            function observeHash()
            {
                if (location.hash && location.hash.length > 1) {
                    var e, retryInt;
                    try {
                        e = $(location.hash);
                    } catch (err) {
                        return;
                    }

                    if (e.length && pane.find(e)) {
                        // nasty workaround but it appears to take a little while before the hash has done its thing
                        // to the rendered page so we just wait until the container's scrollTop has been messed up.
                        if (container.scrollTop() == 0) {
                            retryInt = setInterval(
                                function()
                                {
                                    if (container.scrollTop() > 0) {
                                        scrollToElement(location.hash, true);
                                        $(document).scrollTop(container.position().top);
                                        clearInterval(retryInt);
                                    }
                                },
                                50
                            )
                        } else {
                            scrollToElement(location.hash, true);
                            $(document).scrollTop(container.position().top);
                        }
                    }
                }
            }

            function unhijackInternalLinks()
            {
                $('a.jspHijack').unbind('click.jsp-hijack').removeClass('jspHijack');
            }

            function hijackInternalLinks()
            {
                unhijackInternalLinks();
                $('a[href^=#]').addClass('jspHijack').bind(
                    'click.jsp-hijack',
                    function()
                    {
                        var uriParts = this.href.split('#'), hash;
                        if (uriParts.length > 1) {
                            hash = uriParts[1];
                            if (hash.length > 0 && pane.find('#' + hash).length > 0) {
                                scrollToElement('#' + hash, true);
                                // Need to return false otherwise things mess up... Would be nice to maybe also scroll
                                // the window to the top of the scrollpane?
                                return false;
                            }
                        }
                    }
                )
            }

            // Public API
            $.extend(
                jsp,
                {
                    // Reinitialises the scroll pane (if it's internal dimensions have changed since the last time it
                    // was initialised). The settings object which is passed in will override any settings from the
                    // previous time it was initialised - if you don't pass any settings then the ones from the previous
                    // initialisation will be used.
                    reinitialise: function(s)
                    {
                        s = $.extend({}, s, settings);
                        initialise(s);
                    },
                    // Scrolls the specified element (a jQuery object, DOM node or jQuery selector string) into view so
                    // that it can be seen within the viewport. If stickToTop is true then the element will appear at
                    // the top of the viewport, if it is false then the viewport will scroll as little as possible to
                    // show the element. You can also specify if you want animation to occur. If you don't provide this
                    // argument then the animateScroll value from the settings object is used instead.
                    scrollToElement: function(ele, stickToTop, animate)
                    {
                        scrollToElement(ele, stickToTop, animate);
                    },
                    // Scrolls the pane so that the specified co-ordinates within the content are at the top left
                    // of the viewport. animate is optional and if not passed then the value of animateScroll from
                    // the settings object this jScrollPane was initialised with is used.
                    scrollTo: function(destX, destY, animate)
                    {
                        scrollToX(destX, animate);
                        scrollToY(destY, animate);
                    },
                    // Scrolls the pane so that the specified co-ordinate within the content is at the left of the
                    // viewport. animate is optional and if not passed then the value of animateScroll from the settings
                    // object this jScrollPane was initialised with is used.
                    scrollToX: function(destX, animate)
                    {
                        scrollToX(destX, animate);
                    },
                    // Scrolls the pane so that the specified co-ordinate within the content is at the top of the
                    // viewport. animate is optional and if not passed then the value of animateScroll from the settings
                    // object this jScrollPane was initialised with is used.
                    scrollToY: function(destY, animate)
                    {
                        scrollToY(destY, animate);
                    },
                    // Scrolls the pane by the specified amount of pixels. animate is optional and if not passed then
                    // the value of animateScroll from the settings object this jScrollPane was initialised with is used.
                    scrollBy: function(deltaX, deltaY, animate)
                    {
                        jsp.scrollByX(deltaX, animate);
                        jsp.scrollByY(deltaY, animate);
                    },
                    // Scrolls the pane by the specified amount of pixels. animate is optional and if not passed then
                    // the value of animateScroll from the settings object this jScrollPane was initialised with is used.
                    scrollByX: function(deltaX, animate)
                    {
                        var destX = contentPositionX() + deltaX,
                            percentScrolled = destX / (contentWidth - paneWidth);
                        positionDragX(percentScrolled * dragMaxX, animate);
                    },
                    // Scrolls the pane by the specified amount of pixels. animate is optional and if not passed then
                    // the value of animateScroll from the settings object this jScrollPane was initialised with is used.
                    scrollByY: function(deltaY, animate)
                    {
                        var destY = contentPositionY() + deltaY,
                            percentScrolled = destY / (contentHeight - paneHeight);
                        positionDragY(percentScrolled * dragMaxY, animate);
                    },
                    // This method is called when jScrollPane is trying to animate to a new position. You can override
                    // it if you want to provide advanced animation functionality. It is passed the following arguments:
                    //  * ele          - the element whose position is being animated
                    //  * prop         - the property that is being animated
                    //  * value        - the value it's being animated to
                    //  * stepCallback - a function that you must execute each time you update the value of the property
                    // You can use the default implementation (below) as a starting point for your own implementation.
                    animate: function(ele, prop, value, stepCallback)
                    {
                        var params = {};
                        params[prop] = value;
                        ele.animate(
                            params,
                            {
                                'duration'  : settings.animateDuration,
                                'ease'      : settings.animateEase,
                                'queue'     : false,
                                'step'      : stepCallback
                            }
                        );
                    },
                    // Returns the current x position of the viewport with regards to the content pane.
                    getContentPositionX: function()
                    {
                        return contentPositionX();
                    },
                    // Returns the current y position of the viewport with regards to the content pane.
                    getContentPositionY: function()
                    {
                        return contentPositionY();
                    },
                    // Returns whether or not this scrollpane has a horizontal scrollbar.
                    getIsScrollableH: function()
                    {
                        return isScrollableH;
                    },
                    // Returns whether or not this scrollpane has a vertical scrollbar.
                    getIsScrollableV: function()
                    {
                        return isScrollableV;
                    },
                    // Gets a reference to the content pane. It is important that you use this method if you want to
                    // edit the content of your jScrollPane as if you access the element directly then you may have some
                    // problems (as your original element has had additional elements for the scrollbars etc added into
                    // it).
                    getContentPane: function()
                    {
                        return pane;
                    },
                    // Scrolls this jScrollPane down as far as it can currently scroll. If animate isn't passed then the
                    // animateScroll value from settings is used instead.
                    scrollToBottom: function(animate)
                    {
                        positionDragY(dragMaxY, animate);
                    },
                    // Hijacks the links on the page which link to content inside the scrollpane. If you have changed
                    // the content of your page (e.g. via AJAX) and want to make sure any new anchor links to the
                    // contents of your scroll pane will work then call this function.
                    hijackInternalLinks: function()
                    {
                        hijackInternalLinks();
                    }
                }
            );
        }

        // Pluginifying code...

        settings = $.extend({}, $.fn.jScrollPane.defaults, settings);

        var ret;
        this.each(
            function()
            {
                var elem = $(this), jspApi = elem.data('jsp');
                if (jspApi) {
                    jspApi.reinitialise(settings);
                } else {
                    jspApi = new JScrollPane(elem, settings);
                    elem.data('jsp', jspApi);
                }
                ret = ret ? ret.add(elem) : elem;
            }
        )
        return ret;
    };

    $.fn.jScrollPane.defaults = {
        'showArrows'                : false,
        'maintainPosition'          : true,
        'clickOnTrack'              : true,
        'autoReinitialise'          : false,
        'autoReinitialiseDelay'     : 500,
        'verticalDragMinHeight'     : 0,
        'verticalDragMaxHeight'     : 99999,
        'horizontalDragMinWidth'    : 0,
        'horizontalDragMaxWidth'    : 99999,
        'animateScroll'             : false,
        'animateDuration'           : 300,
        'animateEase'               : 'linear',
        'hijackInternalLinks'       : false,
        'verticalGutter'            : 4,
        'horizontalGutter'          : 4,
        'mouseWheelSpeed'           : 10,
        'arrowButtonSpeed'          : 10,
        'arrowRepeatFreq'           : 100,
        'arrowScrollOnHover'        : false,
        'trackClickSpeed'           : 30,
        'trackClickRepeatFreq'      : 1,
        'verticalArrowPositions'    : 'split',
        'horizontalArrowPositions'  : 'split',
        'enableKeyboardNavigation'  : true,
        'hideFocus'                 : false
    };

})(jQuery,this);

(function($){
    $.each(['touchstart', 'touchend', 'touchmove'], function(i, name){
        if(!document.addEventListener){return;}
            var blockSimple;
            //capture events on document
            document.addEventListener(name, function(e){
                if(e.touches && e.touches.length > 1){
                    blockSimple = true;
                    setTimeout(function(){
                        blockSimple = false;
                    }, 9);
                }
            }, true);
            $.event.special['simple'+name] = {
                setup: function(){
                $(this).bind(name, $.event.special['simple'+name].handler);
                return true;
            },
            teardown: function(){
                $(this).unbind('.touchdrag');
                return true;
            },
            handler: function(e, d){
                if(blockSimple || !e.originalEvent || !e.originalEvent.touches || e.originalEvent.touches.length !== 1){return;}
                var te = e.originalEvent.touches.item(0);
            
                te.type = 'simple'+name;
                te.preventDefault = function(){
                    e.preventDefault();
                };
                return $.event.handle.apply(this, [te, d]);
            }
        };
    });
})(jQuery);