var Slider=Class.create();Slider.prototype={options:{shift:900},initialize:function(container,controlLeft,controlRight){this.animating=false;this.containerSize={width:$(container).offsetWidth,height:$(container).offsetHeight},this.content=$(container).down();this.controlLeft=$(controlLeft);this.controlRight=$(controlRight);this.initControls();},initControls:function(){this.controlLeft.href=this.controlRight.href='javascript:void(0)';Event.observe(this.controlLeft,'click',this.shiftLeft.bind(this));Event.observe(this.controlRight,'click',this.shiftRight.bind(this));this.updateControls(1,0);},shiftRight:function(){if(this.animating)
return;var left=isNaN(parseInt(this.content.style.left))?0:parseInt(this.content.style.left);if((left+this.options.shift)<0){var shift=this.options.shift;this.updateControls(1,1);}else{var shift=Math.abs(left);this.updateControls(1,0);}
this.moveTo(shift);},shiftLeft:function(){if(this.animating)
return;var left=isNaN(parseInt(this.content.style.left))?0:parseInt(this.content.style.left);var lastItemLeft=this.content.childElements().last().positionedOffset()[0];var lastItemWidth=this.content.childElements().last().getWidth();var contentWidth=lastItemLeft+lastItemWidth+8;if((contentWidth+left-this.options.shift)>this.containerSize.width){var shift=this.options.shift;this.updateControls(1,1);}else{var shift=contentWidth+left-this.containerSize.width;this.updateControls(0,1);}
this.moveTo(-shift);},moveTo:function(shift){var scope=this;this.animating=true;new Effect.Move(this.content,{x:shift,duration:0.4,delay:0,afterFinish:function(){scope.animating=false;}});},updateControls:function(left,right){if(!left)
this.controlLeft.addClassName('disabled');else
this.controlLeft.removeClassName('disabled');if(!right)
this.controlRight.addClassName('disabled');else
this.controlRight.removeClassName('disabled');}}