var curIndex=0;
//时间间隔 单位毫秒
var timeInterval=3000;
var arr=new Array();
arr[0]="/uploadfile/200901/20090103041612331.jpg";
arr[1]="/uploadfile/200901/20090103041626618.jpg";
arr[2]="/uploadfile/200901/20090103041514691.jpg";
arr[3]="/uploadfile/200901/20090103041540656.jpg";
arr[4]="/uploadfile/200901/20090103041557206.jpg";
setInterval(changeImg,timeInterval);
function changeImg()
{
	var obj=document.getElementById("obj");
	if (curIndex==arr.length-1) 
	{
		curIndex=0;
	}
	else
	{
		curIndex+=1;
	}
	obj.src=arr[curIndex];
}