帮我看看,这段js验证代码,什么地方,出错了,谢谢了.

<form name="zhuce" onSubmit="return checkform();" action="">

帐号<input type="text" name="T1" size="20"><br>

<input type="submit" value="提交" name="B1">

</form>

<script language="javascript">

function checkform()

{

if (this.T1.value==''){alert('用户名不能为空！');return false;}

}

</script>

this.T1.value

改成

this.zhuce.T1.value