// JavaScript Document
function scroll1_initialize(){
	var self	=this;
	var obj		= document.getElementById('scroll1');
	//if(obj.getElementsByTagName('li').length==0)return;
	var links	= obj.getElementsByTagName('img');
	var a		= links[0];
	var b		= links[links.length-1];	
	var ul		= obj.getElementsByTagName('ul')[0];
	var div		= document.getElementById('scrollContent');
	 
	var li_width	= obj.getElementsByTagName('li')[0].offsetWidth+2;
	var li_count	= obj.getElementsByTagName('li').length;
	var ul_width	= li_width * li_count;
	
	this.speed		= 3000;
	this.mar		= null;

	this.doSlide = function(n,t,d,c){
		var timers=new Array(n);
		var x=div.scrollLeft;
		for(var i=0;i<n;i++)(function(){
			if(timers[i]) clearTimeout(timers[i]);
			var j=i;
			timers[i]=setTimeout(function(){
				if(d==0){
					if(ul_width-div.scrollLeft<=0){
						div.scrollLeft-=ul_width;
					}else{			
						div.scrollLeft=x+Math.round((c*li_width)*Math.sin(Math.PI*(j+1)/(2*n)));
					}
				}else{
					if(div.scrollLeft<=0){
					}else{			
						div.scrollLeft=x-Math.round((c*li_width)*Math.sin(Math.PI*(j+1)/(2*n)));
					}
				}
			},(i+1)*t);
		})();

		if(ul_width-div.scrollLeft<=0 || (div.scrollLeft % li_width != 0 && div.scrollLeft != 0)){
			div.scrollLeft=0;
		}
	}	
	this.istop=function(){
		clearInterval(self.mar);
	};
	this.istart=function(){
		self.mar = setInterval(function(){self.doSlide(20,40,0,1);},self.speed);
	};
	
	this.initialize = function(){		
		ul.innerHTML+=ul.innerHTML;
		ul.style.width = parseInt(ul_width * 2) + 'px';
		a.onclick=function(e){self.doSlide(20,40,0,3);return false;};
		a.onfocus=function(){this.blur();};
		a.onmouseout=function(){self.istart();};
		a.onmouseover=function(){self.istop();};
		b.onclick=function(e){self.doSlide(20,40,1,3);return false;};
		b.onfocus=function(){this.blur();};
		b.onmouseout=function(){self.istart();};
		b.onmouseover=function(){self.istop();};
		div.onmouseout=function(){self.istart();};
		div.onmouseover=function(){self.istop();};
		this.istart();
	};
	
	this.initialize();
}
scroll1_initialize();