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(){ $(":selected").css("background-color","red"); }); </script> </head> <body> <form action=""> Name: <input type="text" name="user"><br> Car: <select> <option>Volvo</option> <option selected="selected">Saab</option> <option>Mercedes</option> <option>Audi</option> </select> </form> </body> </html>
运行结果：