页面中存在<img src="/images/logo.gif" />这样一段，请修改一下并加入脚本，当此图片加载完毕后，判断其宽度是否超过500px，若超过则将图片宽度设置为500px,否则保持原来大小。
<img src="/images/logo.gif"> onload="javascript:InitImage(this)"
<script lange="javascript">
function InitImage(imgObj)
{
}
</script>
<img src="/images/logo.gif"> onload="javascript:InitImage(this)"
<script lange="javascript">
function InitImage(imgObj)
{
}
</script>
<!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><script lange="javascript">
window.onload = function(){
var img = document.getElementById('img');
alert(img.width);
if(img.width > 500){
img.width = 500;
}
};
</script>
</head><body>
<img src="未命名2.jpg" id="img" />
</body>
</html>
img.width = 500;
}
css width:expression(width>500?"500":auto);