<!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>
<title>计算元素样式</title>
<style type="text/css">
#myDiv
{
background-color: blue;
width: 100px;
height: 200px;
}
</style>
</head>
<body>
<div id="myDiv" style="background-color: red; border: 1px solid black">
</div>
<script type="text/javascript">
var myDiv = document.getElementById("myDiv");
alert(getStyle(myDiv,"backgroundColor"));//"red" 或 rgb(255,0,0)
alert(getStyle(myDiv,"width")); //"100px"
alert(getStyle(myDiv,"height")); //"200px"
alert(getStyle(myDiv,"border")); //在某些浏览器中是“1px solid black”
//var computedStyle = document.defaultView.getComputedStyle(myDiv, null);
//alert(computedStyle.backgroundColor); //"red"
//alert(computedStyle.width); //"100px"
//alert(computedStyle.height); //"200px"
//alert(computedStyle.border); //在某些浏览器中是“1px solid black”
//获取DOM的style属性
function getStyle(obj,attr)
{
if(obj.currentStyle) //用于IE
{
return obj.currentStyle[attr];
}
else
{
// document.defaultView.getComputedStyle 该方法时DOM2中才出现的方法
return document.defaultView.getComputedStyle(myDiv, null)[attr];
//getComputedStyle DOM1中的方法
//return getComputedStyle(obj,false)[attr];
}
}
</script>
</body>
</html>
