UC知道帮我看看,这段js验证代码,什么地方,出错了,谢谢了.
来源：百度知道 编辑：UC知道 时间：2024/05/18 16:15:01
<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>
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
<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 (document.getElementById('T1').value==''){alert('用户名不能为空！');return false;}
}
</script>