(function($){
$.jScrollPane={active:[]};
$.fn.jScrollPane=function(settings){settings=$.extend({},$.fn.jScrollPane.defaults,settings);
var rf=function(){return false;};
return this.each(function(){var $this=$(this);var paneEle=this;var currentScrollPosition=0;var paneWidth;var paneHeight;var trackHeight;var trackOffset=settings.topCapHeight;var $container;
if($(this).parent().is('.jScrollPaneContainer')){
$container=$(this).parent();currentScrollPosition=settings.maintainPosition?$this.position().top:0;var $c=$(this).parent();paneWidth=$c.innerWidth();paneHeight=$c.outerHeight();
$('>.jScrollPaneTrack,>.jScrollArrowUp,>.jScrollArrowDown,>.jScrollCap',$c).remove();$this.css({'top':0});
}else{
$this.data('originalStyleTag',$this.attr('style'));$this.css('overflow','hidden');
this.originalPadding=$this.css('paddingTop')+' '+$this.css('paddingRight')+' '+$this.css('paddingBottom')+' '+$this.css('paddingLeft');
this.originalSidePaddingTotal=(parseInt($this.css('paddingLeft'))||0)+(parseInt($this.css('paddingRight'))||0);
paneWidth=$this.innerWidth();paneHeight=$this.innerHeight();
$container=$('<div></div>').attr({'className':'jScrollPaneContainer'}).css({'height':paneHeight+'px','width':paneWidth+'px'});
if(settings.enableKeyboardNavigation){$container.attr('tabindex',settings.tabIndex);}
$this.wrap($container);$container=$this.parent();$(document).bind('emchange',function(e,cur,prev){$this.jScrollPane(settings);});}
trackHeight=paneHeight;
if(settings.reinitialiseOnImageLoad){
var $imagesToLoad=$.data(paneEle,'jScrollPaneImagesToLoad')||$('img',$this);var loadedImages=[];
if($imagesToLoad.length){$imagesToLoad.each(function(i,val){
$(this).bind('load readystatechange',function(){if($.inArray(i,loadedImages)==-1){loadedImages.push(val);$imagesToLoad=$.grep($imagesToLoad,function(n,i){return n!=val;
});
$.data(paneEle,'jScrollPaneImagesToLoad',$imagesToLoad);var s2=$.extend(settings,{reinitialiseOnImageLoad:false});$this.jScrollPane(s2);}
}).each(function(i,val){if(this.complete||this.complete===undefined){this.src=this.src;}});});};}
var p=this.originalSidePaddingTotal;var realPaneWidth=paneWidth-settings.scrollbarWidth-settings.scrollbarMargin-p;var cssToApply={'height':'auto','width':realPaneWidth+'px'}
if(settings.scrollbarOnLeft){cssToApply.paddingLeft=settings.scrollbarMargin+settings.scrollbarWidth+'px';}else{cssToApply.paddingRight=settings.scrollbarMargin+'px';}
$this.css(cssToApply);var contentHeight=$this.outerHeight();var percentInView=paneHeight/contentHeight;var isScrollable=percentInView<.99;
$container[isScrollable?'addClass':'removeClass']('jScrollPaneScrollable');
if(isScrollable){$container.append($('<div></div>').addClass('jScrollCap jScrollCapTop').css({height:settings.topCapHeight}),$('<div></div>').attr({'className':'jScrollPaneTrack'}).css({'width':settings.scrollbarWidth+'px'}).append($('<div></div>').attr({'className':'jScrollPaneDrag'}).css({'width':settings.scrollbarWidth+'px'}).append($('<div></div>').attr({'className':'jScrollPaneDragTop'}).css({'width':settings.scrollbarWidth+'px'}),$('<div></div>').attr({'className':'jScrollPaneDragBottom'}).css({'width':settings.scrollbarWidth+'px'})
)),$('<div></div>').addClass('jScrollCap jScrollCapBottom').css({height:settings.bottomCapHeight}));
var $track=$('>.jScrollPaneTrack',$container);var $drag=$('>.jScrollPaneTrack .jScrollPaneDrag',$container);var currentArrowDirection;var currentArrowTimerArr=[];var currentArrowInc;
var whileArrowButtonDown=function(){if(currentArrowInc>4||currentArrowInc%4==0){positionDrag(dragPosition+currentArrowDirection*mouseWheelMultiplier);}currentArrowInc++;};
if(settings.enableKeyboardNavigation){
$container.bind(
'keydown.jscrollpane',
function(e){
switch(e.keyCode){
case 38:
currentArrowDirection=-1;currentArrowInc=0;whileArrowButtonDown();currentArrowTimerArr[currentArrowTimerArr.length]=setInterval(whileArrowButtonDown,100);
return false;
case 40:
currentArrowDirection=1;currentArrowInc=0;whileArrowButtonDown();currentArrowTimerArr[currentArrowTimerArr.length]=setInterval(whileArrowButtonDown,100);
return false;
case 33:
case 34:
return false;
default:
}
}
).bind(
'keyup.jscrollpane',
function(e){
if(e.keyCode==38||e.keyCode==40){for(var i=0;i<currentArrowTimerArr.length;i++){clearInterval(currentArrowTimerArr[i]);}
return false;
}});}
if(settings.showArrows){
var currentArrowButton;var currentArrowInterval;
var onArrowMouseUp=function(event){$('html').unbind('mouseup',onArrowMouseUp);currentArrowButton.removeClass('jScrollActiveArrowButton');clearInterval(currentArrowInterval);};
var onArrowMouseDown=function(){$('html').bind('mouseup',onArrowMouseUp);currentArrowButton.addClass('jScrollActiveArrowButton');currentArrowInc=0;whileArrowButtonDown();currentArrowInterval=setInterval(whileArrowButtonDown,100);};
$container.append($('<a></a>').attr({'href':'javascript:;','className':'jScrollArrowUp','tabindex':-1}).css({'width':settings.scrollbarWidth+'px','top':settings.topCapHeight+'px'}).html('Scroll up').bind('mousedown',function(){currentArrowButton=$(this);currentArrowDirection=-1;onArrowMouseDown();
this.blur();return false;}).bind('click',rf),$('<a></a>').attr({'href':'javascript:;','className':'jScrollArrowDown','tabindex':-1}).css({'width':settings.scrollbarWidth+'px','bottom':settings.bottomCapHeight+'px'}).html('Scroll down').bind('mousedown',function(){currentArrowButton=$(this);currentArrowDirection=1;onArrowMouseDown();this.blur();return false;}).bind('click',rf));
var $upArrow=$('>.jScrollArrowUp',$container);var $downArrow=$('>.jScrollArrowDown',$container);
}
if(settings.arrowSize){trackHeight=paneHeight-settings.arrowSize-settings.arrowSize;trackOffset+=settings.arrowSize;
}else if($upArrow){var topArrowHeight=$upArrow.height();settings.arrowSize=topArrowHeight;trackHeight=paneHeight-topArrowHeight-$downArrow.height();trackOffset+=topArrowHeight;}
trackHeight-=settings.topCapHeight+settings.bottomCapHeight;$track.css({'height':trackHeight+'px',top:trackOffset+'px'})
var $pane=$(this).css({'position':'absolute','overflow':'visible'});var currentOffset;var maxY;var mouseWheelMultiplier;var dragPosition=0;var dragMiddle=percentInView*paneHeight/2;var getPos=function(event,c){var p=c =='X'?'Left':'Top';return event['page'+c]||(event['client'+c]+(document.documentElement['scroll'+p]||document.body['scroll'+p]))||0;};
var ignoreNativeDrag=function(){return false;};
var initDrag=function(){ceaseAnimation();currentOffset=$drag.offset(false);currentOffset.top-=dragPosition;maxY=trackHeight-$drag[0].offsetHeight;mouseWheelMultiplier=2*settings.wheelSpeed*maxY/contentHeight;};
var onStartDrag=function(event){initDrag();dragMiddle=getPos(event,'Y')-dragPosition-currentOffset.top;$('html').bind('mouseup',onStopDrag).bind('mousemove',updateScroll);
if($.browser.msie){$('html').bind('dragstart',ignoreNativeDrag).bind('selectstart',ignoreNativeDrag);}
return false;
};
var onStopDrag=function(){$('html').unbind('mouseup',onStopDrag).unbind('mousemove',updateScroll);dragMiddle=percentInView*paneHeight/2;if($.browser.msie){$('html').unbind('dragstart',ignoreNativeDrag).unbind('selectstart',ignoreNativeDrag);}};
var positionDrag=function(destY){$container.scrollTop(0);destY=destY<0?0:(destY>maxY?maxY:destY);dragPosition=destY;
$drag.css({'top':destY+'px'});var p=destY/maxY;$this.data('jScrollPanePosition',(paneHeight-contentHeight)*-p);$pane.css({'top':((paneHeight-contentHeight)*p)+'px'});
$this.trigger('scroll');if(settings.showArrows){$upArrow[destY==0?'addClass':'removeClass']('disabled');$downArrow[destY==maxY?'addClass':'removeClass']('disabled');}};
var updateScroll=function(e){positionDrag(getPos(e,'Y')-currentOffset.top-dragMiddle);};var dragH=Math.max(Math.min(percentInView*(paneHeight-settings.arrowSize*2),settings.dragMaxHeight),settings.dragMinHeight);$drag.css({'height':dragH+'px'}).bind('mousedown',onStartDrag);var trackScrollInterval;var trackScrollInc;var trackScrollMousePos;var doTrackScroll=function(){if(trackScrollInc>8||trackScrollInc%4==0){positionDrag((dragPosition-((dragPosition-trackScrollMousePos)/2)));}trackScrollInc ++;};var onStopTrackClick=function(){clearInterval(trackScrollInterval);$('html').unbind('mouseup',onStopTrackClick).unbind('mousemove',onTrackMouseMove);};var onTrackMouseMove=function(event){trackScrollMousePos=getPos(event,'Y')-currentOffset.top-dragMiddle;};var onTrackClick=function(event){initDrag();onTrackMouseMove(event);trackScrollInc=0;$('html').bind('mouseup',onStopTrackClick).bind('mousemove',onTrackMouseMove);trackScrollInterval=setInterval(doTrackScroll,100);doTrackScroll();return false;};
$track.bind('mousedown',onTrackClick);
$container.bind('mousewheel',
function(event,delta){delta=delta||(event.wheelDelta?event.wheelDelta/120:(event.detail)?-event.detail/3:0);initDrag();ceaseAnimation();var d=dragPosition;positionDrag(dragPosition-delta*mouseWheelMultiplier);var dragOccured=d!=dragPosition;return !dragOccured;});
var _animateToPosition;var _animateToInterval;
function animateToPosition(){var diff=(_animateToPosition-dragPosition)/settings.animateStep;if(diff>1||diff<-1){positionDrag(dragPosition+diff);}else{positionDrag(_animateToPosition);ceaseAnimation();}}
var ceaseAnimation=function(){if(_animateToInterval){clearInterval(_animateToInterval);delete _animateToPosition;}};
var scrollTo=function(pos,preventAni){
if(typeof pos=="string"){try{$e=$(pos,$this);}catch(err){return;}
if(!$e.length) return;
pos=$e.offset().top-$this.offset().top;
}
ceaseAnimation();
var maxScroll=contentHeight-paneHeight;
pos=pos > maxScroll?maxScroll:pos;
$this.data('jScrollPaneMaxScroll',maxScroll);
var destDragPosition=pos/maxScroll*maxY;
if(preventAni||!settings.animateTo){
positionDrag(destDragPosition);
}else{$container.scrollTop(0);_animateToPosition=destDragPosition;_animateToInterval=setInterval(animateToPosition,settings.animateInterval);}};
$this[0].scrollTo=scrollTo;
$this[0].scrollBy=function(delta){var currentPos=-parseInt($pane.css('top'))||0;scrollTo(currentPos+delta);};
initDrag();
scrollTo(-currentScrollPosition,true);
$('*',this).bind('focus',function(event){var $e=$(this);var eleTop=0;while($e[0]!=$this[0]){eleTop += $e.position().top;$e=$e.offsetParent();}
var viewportTop=-parseInt($pane.css('top'))||0;
var maxVisibleEleTop=viewportTop+paneHeight;
var eleInView=eleTop > viewportTop&&eleTop < maxVisibleEleTop;
if(!eleInView){
var destPos=eleTop-settings.scrollbarMargin;
if(eleTop > viewportTop){
destPos += $(this).height()+15+settings.scrollbarMargin-paneHeight;
}
scrollTo(destPos);}})
if(settings.observeHash){
if(location.hash&&location.hash.length > 1){setTimeout(function(){scrollTo(location.hash);},$.browser.safari?100:0);}
$(document).bind('click',function(e){
$target=$(e.target);if($target.is('a')){var h=$target.attr('href');if(h&&h.substr(0,1)=='#'&&h.length > 1){setTimeout(function(){scrollTo(h,!settings.animateToInternalLinks);},$.browser.safari?100:0);}}});}
function onSelectScrollMouseDown(e){$(document).bind('mousemove.jScrollPaneDragging',onTextSelectionScrollMouseMove);$(document).bind('mouseup.jScrollPaneDragging',onSelectScrollMouseUp);}
var textDragDistanceAway;var textSelectionInterval;
function onTextSelectionInterval(){direction=textDragDistanceAway < 0?-1:1;$this[0].scrollBy(textDragDistanceAway/2);}
function clearTextSelectionInterval(){if(textSelectionInterval){clearInterval(textSelectionInterval);textSelectionInterval=undefined;}}
function onTextSelectionScrollMouseMove(e){var offset=$this.parent().offset().top;var maxOffset=offset+paneHeight;var mouseOffset=getPos(e,'Y');textDragDistanceAway=mouseOffset<offset?mouseOffset-offset:(mouseOffset>maxOffset?mouseOffset-maxOffset:0);if(textDragDistanceAway==0){clearTextSelectionInterval();}else{if(!textSelectionInterval){textSelectionInterval=setInterval(onTextSelectionInterval,100);}}}
function onSelectScrollMouseUp(e){$(document).unbind('mousemove.jScrollPaneDragging').unbind('mouseup.jScrollPaneDragging');clearTextSelectionInterval();}
$container.bind('mousedown.jScrollPane',onSelectScrollMouseDown);$.jScrollPane.active.push($this[0]);}else{$this.css({'height':paneHeight+'px','width':paneWidth-this.originalSidePaddingTotal+'px','padding':this.originalPadding});$this[0].scrollTo=$this[0].scrollBy=function(){};$this.parent().unbind('mousewheel').unbind('mousedown.jScrollPane').unbind('keydown.jscrollpane').unbind('keyup.jscrollpane');}})};
$.fn.jScrollPaneRemove=function(){$(this).each(function(){$this=$(this);var $c=$this.parent();if($c.is('.jScrollPaneContainer')){$this.css({'top':'','height':'','width':'','padding':'','overflow':'','position':''});$this.attr('style',$this.data('originalStyleTag'));$c.after($this).remove();}});}
$.fn.jScrollPane.defaults={scrollbarWidth:10,scrollbarMargin:5,wheelSpeed:18,showArrows:false,arrowSize:0,animateTo:false,dragMinHeight:1,dragMaxHeight:99999,animateInterval:100,animateStep:3,maintainPosition:true,scrollbarOnLeft:false,reinitialiseOnImageLoad:false,tabIndex:0,enableKeyboardNavigation:true,animateToInternalLinks:false,topCapHeight:0,bottomCapHeight:0,observeHash:true};
$(window).bind('unload',function(){var els=$.jScrollPane.active;for(var i=0;i<els.length;i++){els[i].scrollTo=els[i].scrollBy=null;}});})(jQuery);