1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
2 <html xmlns="http://www.w3.org/1999/xhtml">
3 <head>
4 <meta http-equiv="Content-Type" content="text/html;charset=UTF-8" />
5 <title></title>
6 <style type="text/css">
7 div.box{
8 background-color:blue;
9 width:100px;
10 height:200px;
11 }
12 </style>
13 <script type="text/javascript" src="test49.js"></script>
14 </head>
15 <body>
16
17 </body>
18 </html>
1 var sheet = document.styleSheets[0];
2 var rules = sheet.cssRules || sheet.rules;
3 var rule = rules[0];
4 console.log(rule.selectorText);
5 console.log(rule.style.cssText);
6 console.log(rule.style.backgroundColor);
7 console.log(rule.style.width);
8 console.log(rule.style.height);
9
10 rule.style.backgroundColor = "red";
11 console.log(rule.style.backgroundColor);
