可不可以这样提交表单？
<script language="JavaScript" type="text/javascript" >
function check(){
myform.submit();
}
</script>
<form action="" method="post" name="myform">
<table>
  <tr><td>用户名：</td><td><input type="text" name="name"/></td></tr>
  <tr><td>密码：</td><td><input type="password" name="pw"/></td></tr>
</table>
  <input type="button" name="submit" value="确定" onclick="check()"/>
</form>

------解决方案--------------------
http://xiayuanfeng.iteye.com/blog/311433