问题是一个网友提出来的,想要达到的效果是:如果是图片宽高比大于150/240,以宽为主，宽＝150，高度自动,否则，以高为主，高＝240,宽度自动,
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>无标题文档</title>
</head>
<script type="text/javascript">
function pic(){
var p=document.getElementsByTagName("img");
for(var i=0;i<p.length;i++){
pp=p[i];
var pw = pp.width;
var ph = pp.height;
if((150/240)>(pw/ph)){
pp.style.width = "auto";
pp.style.height = "240px";
}
if((150/240)<(pw/ph)){
pp.style.width = "150px";
pp.style.height= "auto";
}
}
}
</script>
<body onLoad="pic()">
<img src=http://www.webjx.com/JavaScript/20071213/"http://www.webjx.com/files/allimg/071212/1605480.jpg" width="314" height="500">
<img src=http://www.webjx.com/JavaScript/20071213/"http://www.webjx.com/files/allimg/071212/1605481.jpg" width="552" height="432">
</body>
</html>
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