消息提示onsubmit返回验证，但表单仍提交

问题描述：

我遇到了一些与此参考非常相似的问题 onsubmit返回false无效，表单仍提交吗? 我已经遵循了解决方案，但是如果将其更改为onclick，它将无法正常工作，甚至都不会提示任何消息.

I am having some issues which is quite similar referring to this onsubmit return false does not work, form still submits? I've followed the solution but if I changed it to onclick, it won't work, not even a message prompts out.

我正在使用的脚本.

<script>
function validate()
{
  var validate = false;
  if(document.getElementById("nameId").value == "")
  {  
    alert("NAME IS REQUIRED");
    validate   = false
  }

return true ;
}

</script>

我的代码附在下面.

<table class="<?php echo $table_style_3;?>" style='width: auto;'>
<form action="fhd_add_type.php" method="post" class="form-horizontal"   onsubmit="return validate()"> //This is the part where i've changed to onclick
<input type='hidden' name='nacl' value='<?php echo $nacl;?>'>
<input type='hidden' name='type' value='<?php echo $type;?>'>
<?php
if ($type <> 0) { ?>
    <tr><td>Name: </td><td><input type='text' name='type_name' id = "nameId"></td></tr> //This is the field where need to be validate
    <tr><td colspan='2'><input type='submit' value='add' class='btn btn-primary'></td></tr>
    </table>
<?php  }
if ($type == 0) { ?>
    <tr><td>Name</td><td><input type='text' name='type_name' id = "nameId"></td></tr> //This is the field where need to be validate
    <tr><td>Email</td><td><input type='text' name='type_email'></td></tr>
    <tr><td>Location</td><td><input type='text' name='type_location'></td></tr>
    <tr><td>Phone</td><td><input type='text' name='type_phone'></td></tr>
    <tr><td colspan='2'><input type='submit' value='add' class='btn btn-primary'></td></tr>
    </table>
<?php }?>
</form>
</table>

答

我认为这是因为您总是返回true.在您的JS中，尝试以下操作:

I think this is because you're always returning true. In your JS, try this:

<script>
function validate()
{
  var validate = true;
  if(document.getElementById("nameId").value == "") {  
       alert("NAME IS REQUIRED");
       validate = false;
    }

    return validate;
}
</script>

消息提示onsubmit返回验证，但表单仍提交

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