<!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=utf-8">
<title> JS获取CSS属性 </title>
<style type="text/css">
#f{background-color:#FF0000;}
</style>
</head>
<body>
<div id="f" style="200px; height:200px;"></div>
<script type="text/javascript">
var o = document.getElementById('f');
document.write(o.style.width + '<br>'); // 200px
document.write(o.style.backgroundColor + '<br>'); // 空白
function getDefaultStyle(obj,attribute){
return obj.currentStyle?obj.currentStyle[attribute] : document.defaultView.getComputedStyle(obj,false)[attribute];
}
document.write(getDefaultStyle(o, 'width') + '<br>'); // 200px
document.write(getDefaultStyle(o, 'backgroundColor')); // #FF0000
</script>
</body>
</html>
JS獲取CSS屬性方法：
function getDefaultStyle(obj,attribute){
return obj.currentStyle?obj.currentStyle[attribute] : document.defaultView.getComputedStyle(obj,false)[attribute];
}