/*  
// SprySlidingPanels.js - version 0.5 - Spry Pre-Release 1.6.1
// Copyright (c) 2006. Adobe Systems Incorporated.
// All rights reserved.
//Modified by thanhpt
//compressed version
*/SlidingPanels=function(element,opts,step){this.element=xGetElementById(element);this.enableAnimation=true;this.currentPanel=null;this.enableKeyboardNavigation=true;this.hasFocus=false;this.previousPanelKeyCode=SlidingPanels.KEY_LEFT;this.nextPanelKeyCode=SlidingPanels.KEY_RIGHT;this.currentPanelClass="SlidingPanelsCurrentPanel";this.focusedClass="SlidingPanelsFocused";this.animatingClass="SlidingPanelsAnimating";this.itemPanels=null;this.ScrollStep=(typeof step=="number")?step:1;SlidingPanels.setOptions(this,opts);if(this.element)this.element.style.overflow="hidden";if(this.defaultPanel){if(typeof this.defaultPanel=="number")this.currentPanel=this.getContentPanels()[this.defaultPanel];else this.currentPanel=xGetElementById(this.defaultPanel);}if(!this.currentPanel)this.currentPanel=this.getContentPanels()[0];if(SlidingPanels.onloadDidFire)this.attachBehaviors();else SlidingPanels.loadQueue.push(this);};SlidingPanels.prototype.onFocus=function(e){this.hasFocus=true;xAddClass(this.element,this.focusedClass);return false;};SlidingPanels.prototype.onBlur=function(e){this.hasFocus=false;xRemoveClass(this.element,this.focusedClass);return false;};SlidingPanels.KEY_LEFT=37;SlidingPanels.KEY_UP=38;SlidingPanels.KEY_RIGHT=39;SlidingPanels.KEY_DOWN=40;SlidingPanels.prototype.onKeyDown=function(e){if(e==null)e=window.event;var key=e.keyCode;if(!this.hasFocus||(key!=this.previousPanelKeyCode&&key!=this.nextPanelKeyCode))return true;if(key==this.nextPanelKeyCode)this.showNextPanel();else this.showPreviousPanel();if(e.preventDefault)e.preventDefault();else e.returnValue=false;if(e.stopPropagation)e.stopPropagation();else e.cancelBubble=true;return false;};SlidingPanels.prototype.attachBehaviors=function(){var ele=this.element;if(!ele)return;if(this.enableKeyboardNavigation){if(ele){var self=this;xAddEventListener(ele,"focus",self.onFocus,false);xAddEventListener(ele,"blur",self.onBlur,false);xAddEventListener(ele,"keydown",self.onKeyDown,false);}}if(this.currentPanel){var ea=this.enableAnimation;this.enableAnimation=false;this.showPanel(this.currentPanel);this.enableAnimation=ea;}};SlidingPanels.setOptions=function(obj,optionsObj,ignoreUndefinedProps){if(!optionsObj)return;for(var optionName in optionsObj){if(ignoreUndefinedProps&&optionsObj[optionName]==undefined)continue;obj[optionName]=optionsObj[optionName];}};SlidingPanels.prototype.getElementChildren=function(element){var children=[];var child=element.firstChild;while(child){if(child.nodeType==1)children.push(child);child=child.nextSibling;}return children;};SlidingPanels.prototype.getCurrentPanel=function(){return this.currentPanel;};SlidingPanels.prototype.getContentGroup=function(){return xFirstChild(this.element);};SlidingPanels.prototype.getContentPanels=function(){if(this.itemPanels==null){this.itemPanels=this.getElementChildren(this.getContentGroup());}return this.itemPanels;};SlidingPanels.prototype.getContentPanelsCount=function(){return this.getContentPanels().length;};SlidingPanels.processLoadQueue=function(handler){SlidingPanels.onloadDidFire=true;var q=SlidingPanels.loadQueue;var qlen=q.length;for(var i=0;i<qlen;i++)q[i].attachBehaviors();};SlidingPanels.addLoadListener=function(handler){xAddEventListener(window,'load',handler,false);};SlidingPanels.removeLoadListener=function(){xRemoveEventListener(window,'load',SlidingPanels.processLoadQueue,false);var self=this;var panels=self.getContentPanels();var numPanels=panels.length;for(var i=0;i<numPanels;i++){xRemoveEventListener(panels[i],"focus",SlidingPanels.onFocus,false);xRemoveEventListener(panels[i],"blur",SlidingPanels.onBlur,false);xRemoveEventListener(panels[i],"keydown",SlidingPanels.onKeyDown,false);}};SlidingPanels.onloadDidFire=false;SlidingPanels.loadQueue=[];SlidingPanels.addLoadListener(SlidingPanels.processLoadQueue);SlidingPanels.prototype.getContentPanelIndex=function(ele){if(ele){ele=xGetElementById(ele);var panels=this.getContentPanels();var numPanels=panels.length;for(var i=0;i<numPanels;i++){if(panels[i]==ele)return i;}}return-1;};SlidingPanels.prototype.showPanel=function(elementOrIndex){var pIndex= -1;if(typeof elementOrIndex=="number")pIndex=elementOrIndex;else pIndex=this.getContentPanelIndex(elementOrIndex);var numPanels=this.getContentPanelsCount();if(numPanels>0)pIndex=(pIndex>=numPanels)?numPanels-1:pIndex;else pIndex=0;var panel=this.getContentPanels()[pIndex];var contentGroup=this.getContentGroup();if(panel&&contentGroup){if(this.currentPanel)xRemoveClass(this.currentPanel,this.currentPanelClass);this.currentPanel=panel;var nx= -panel.offsetLeft;var ny= -panel.offsetTop;if(this.enableAnimation){if(this.animator)this.animator.stop();var cx=contentGroup.offsetLeft;var cy=contentGroup.offsetTop;if(cx!=nx||cy!=ny){var self=this;xAddClass(this.element,this.animatingClass);this.animator=new SlidingPanels.PanelAnimator(contentGroup,cx,cy,nx,ny,{duration:this.duration,fps:this.fps,transition:this.transition,finish:function(){xRemoveClass(self.element,self.animatingClass);xAddClass(panel,self.currentPanelClass);}});this.animator.start();}}else{contentGroup.style.left=nx+"px";contentGroup.style.top=ny+"px";xAddClass(panel,this.currentPanelClass);}}return panel;};SlidingPanels.prototype.showFirstPanel=function(){return this.showPanel(0);};SlidingPanels.prototype.showLastPanel=function(){return this.showPanel(this.getContentPanels().length-1);};SlidingPanels.prototype.showPreviousPanel=function(){var idx=this.getContentPanelIndex(this.currentPanel)-this.ScrollStep;if(idx<0)return this.showLastPanel();return this.showPanel(idx);};SlidingPanels.prototype.showNextPanel=function(){var idx=this.getContentPanelIndex(this.currentPanel)+this.ScrollStep;if(idx<this.getContentPanels().length-1)return this.showPanel(idx);return this.showPanel(0);};SlidingPanels.PanelAnimator=function(ele,curX,curY,dstX,dstY,opts){this.element=ele;this.curX=curX;this.curY=curY;this.dstX=dstX;this.dstY=dstY;this.fps=60;this.duration=500;this.transition=SlidingPanels.PanelAnimator.defaultTransition;this.startTime=0;this.timerID=0;this.finish=null;var self=this;this.intervalFunc=function(){self.step();};SlidingPanels.setOptions(this,opts,true);this.interval=1000/this.fps;};SlidingPanels.PanelAnimator.defaultTransition=function(time,begin,finish,duration){time/=duration;return begin+((2-time)*time*finish);};SlidingPanels.PanelAnimator.prototype.start=function(){this.stop();this.startTime=(new Date()).getTime();this.timerID=setTimeout(this.intervalFunc,this.interval);};SlidingPanels.PanelAnimator.prototype.stop=function(){if(this.timerID)clearTimeout(this.timerID);this.timerID=0;};SlidingPanels.PanelAnimator.prototype.step=function(){var elapsedTime=(new Date()).getTime()-this.startTime;var done=elapsedTime>=this.duration;var x,y;if(done){x=this.curX=this.dstX;y=this.curY=this.dstY;}else{x=this.transition(elapsedTime,this.curX,this.dstX-this.curX,this.duration);y=this.transition(elapsedTime,this.curY,this.dstY-this.curY,this.duration);}this.element.style.left=x+"px";this.element.style.top=y+"px";if(!done)this.timerID=setTimeout(this.intervalFunc,this.interval);else if(this.finish)this.finish();};