s<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
</head>
<body>
<table id="pic" cellpadding="0" cellspacing="0" border="1" width="991" height="439" bordercolor="red">
<tr>
<td>picture chanage!</td>
</tr>
</table>
<Script Language="JavaScript">
window.onload=function()
{
changePicture();
}
function changePicture(){
image = new Array(3); //定义image为图片数量的数组
image [0] = '1.jpg' //背景图象的路径
image [1] = '2.jpg'
image [2] = '3.jpg'
image [3] = '4.jpg'
number = Math.floor(Math.random() * image.length)+1;
document.getElementById('pic').background="images/"+number+".jpg";
}
</Script>
</body>
</html>
