// JavaScript Document
speed=8;
slideSpeed=2;
function Div_Move(id)
{
	var li_num=document.getElementById("thumbarea").getElementsByTagName('li').length;//获得li的数量
	if(li_num>11)
	{
		moveThumbnails(id);		
	}
}
function moveThumbnails(id)
	{
		var left=document.getElementById("thumbarea").style.left.replace('px','')/1;
		if(id=="left" && left>=0)
		{
			slideThumbs(left,488);			
		}else if(id=="right" && left<0)
		{
			slideThumbs_right(left,488);	
		}
	}
function slideThumbs(left,lenght)
{
	left=Math.abs(left);
	if(left<lenght)
	{
		left+=speed;
		document.getElementById("thumbarea").style.left=0-left;
		var left=document.getElementById("thumbarea").style.left.replace('px','')/1;
		document.getElementById("moveLeft").onclick ="";
		document.getElementById("moveRight").onclick = "";
		setTimeout('slideThumbs(' + left + ',' + lenght + ')',slideSpeed);
	}else
	{
		document.getElementById("moveLeft").onclick = new Function("Div_Move('left')");
		document.getElementById("moveRight").onclick =new Function("Div_Move('right')");
	}
}

function slideThumbs_right(left,lenght)
{
	left=Math.abs(left);
	if(left>0)
	{
		left-=speed;
		document.getElementById("thumbarea").style.left=0-left;
		var left=document.getElementById("thumbarea").style.left.replace('px','')/1;
		document.getElementById("moveLeft").onclick ="";
		document.getElementById("moveRight").onclick = "";
		setTimeout('slideThumbs_right(' + left + ',' + lenght + ')',slideSpeed);
	}else
	{
		document.getElementById("moveLeft").onclick = new Function("Div_Move('left')");
		document.getElementById("moveRight").onclick =new Function("Div_Move('right')");
	}
}