<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title></title>
<script src="../../jq-practice/jq/jquery-2.2.1.min.js"></script>
<script>
$(function(){
alert($(‘div‘).width()); //width
alert($(‘div‘).innerWidth()); //width+padding
alert($(‘div‘).outerWidth()); //width+padding+border
alert($(‘div‘).outerWidth(true)); //width+padding+border+margin
});
</script>
</head>
<body>
<div style="width: 100px; height: 100px; padding: 10px; border: 4px solid red; margin: 5px; background: blue;" ></div>
</body>
</html>
jQuery—一些常见方法（3）【width(),innerWidth(),outerWidth()】
原文：http://www.cnblogs.com/sexintercourse/p/6877924.html