源代码:
<!DOCTYPE html> <html> <head> <script src="http://libs.baidu.com/jquery/1.10.2/jquery.min.js"> </script> <script> $(document).ready(function(){ $(":root").css("background-color","yellow"); }); </script> </head> <body> <h1>This is a heading</h1> </body> </html>
运行结果：