<html> <head> <title></title> <meta http-equiv="Content-Type" content="text/html; charset=gb2312"> <link rel="stylesheet" href="css/text.css" type="text/css"> </head> <body bgcolor="#FFFFFF" text="#000000" leftmargin="0" topmargin="0" marginwidth="0" marginheight="0" onkeydown="on_return();"> <form name ="loginForm" method="post" action="https://www.baidu.com"> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td width="69%" height="30"><span class="font_04">帐户名</span> <input type="text" name="userName" size="18.5"> </td> </tr> <tr> <td width="69%" height="30"><span class="font_04">密 码</span> <input type="password" name="pwd" > </td> </tr> <tr> <td width="31%" height="30"> <a id="sub" onClick='check()' > 登陆</a></td> </tr> </table> </form> </body> </html> <script language="javascript"> function check() { var formname=document.loginForm; formname.submit(); } //回车时，默认是登陆 function on_return(){ if(window.event.keyCode == 13){ if (document.all('sub')!=null){ document.all('sub').click(); } } } </script>文章来源: html回车键登录