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<!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=utf-8" />
<title>无标题文档</title>
<script language="javascript" type="text/javascript">
function changePic2()//定义函数
{
var ImgObj=document.getElementById("myimg");//获得图片对象
var url = ImgObj.src.replace( "file:///","");
var baseUrl = url.substring(0,url.lastIndexOf("/")+1).replace(/\//g,"/");
var currentUrl = url.replace(baseUrl,"");
if(currentUrl == "gril.jpg")//判断语句
{
ImgObj.src="garden.jpg";
}
else
{
ImgObj.src="gril.jpg";
}
}
</script>
</head>
<body onload="setInterval(changePic2,2000)">
<div>
<img id="myimg" width="100" src="gril.jpg"> <br>
</div>
</body>
</html>