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);