1.使用getComputedStyle()方法
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<style type="text/css">
#box {
width: 100px;
height: 100px;
background: red;
}
</style>
<body>
<div id="box"></div>
<script>
var box = document.getElementById("box");
alert(getComputedStyle(box,null).width);
</script>
</body>
</html>
此方法不适用IE6/7/8
2.IE6/7/8使用currentStyle
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<style type="text/css">
#box {
width: 100px;
height: 100px;
background: red;
}
</style>
<body>
<div id="box"></div>
<script>
var box = document.getElementById("box");
alert(box.currentStyle.width);
</script>
</body>
</html>
3.兼容性写法
function getStyle () {
return box.currentStyle.width?box.currentStyle.width:getComputedStyle(box,null).width;
}
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