网页特效---会变色的按钮

<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312"> <title>网页特效---会变色的按钮</title> </head> <body> <style> .start {color:black; background:red} </style> <script LANGUAGE="JAVASCRIPT"> function highlightButton(s) { if ("INPUT"==event.srcElement.tagName) event.srcElement.className=s } </script> <form name="form2" onmouseover="highlightButton('start')" onmouseout="highlightButton('')"> <center><p> <input type="button" value="按这里试试" name="B2"></p> </form> </body> </html>