<!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>
</head>
<body>
<img src="../image/desktop/1.jpg" width="200" height="100" name="aaa"/>
<img src="../image/desktop/2.jpg" width="200" height="100" name="bbb"/>
<img src="../image/desktop/3.jpg" width="200" height="100" name="ccc"/>
<input type=‘button‘ value="chagne" onclick="changeImage()"/>
<script>
function changeImage()
{
var img_name = prompt("please enter your image name:","");
var img_str = "window.document."+img_name;
var img_obj = eval(img_str);
if(img_obj)
img_obj.src = "../image/desktop/"+parseInt(Math.random()*27+1)+".jpg";
}
</script>
</body>
</html>
var json = ‘{"response":"success","level":"ok"}‘;
//result = eval(json);//eval会将{}当做语句块来处理，而不是对象
result = eval(‘(‘+json+‘)‘);
alert(result);
result = (new Function("","return"+json))();
alert(result);
时间： 2024-11-20 13:36:51