Java脚本表单验证

Question

so what I try is to show an error "First name must be filled out" as a text called "check", not as an alert... Please help:) 所以我想做的是显示一个错误“必须填写名字”作为名为“ check”的文本，而不是作为警报...请帮助：）

  <html>
  <body>

 <form name="myForm" action="page.html" onsubmit="return validateForm()" method="post">
  First name: <input type="text" name="box>
 <input type="submit" value="Submit">
</form> 
<p id="check"></p>


<script>

function validateForm() {
var x = document.forms["myForm"]["box"].value;
if (x == null || x == "") {
    alert("First name must be filled out") ="check"; // I tried to send alert as text... 
    return false;
 }
 } 

  </script>

  </body>
   </html>

Thanks in advance! 提前致谢！

Answer 1

Change 更改

alert("First name must be filled out") ="check";

to 至

document.getElementById('check').innerHTML = 'First name must be filled out';

Answer 2

As pure Javascript Solution you could replace the alert with the following code: 作为纯Javascript解决方案，您可以使用以下代码替换alert ：

document.getElementById('check').innerHTML = "First name must be filled out";

In jQuery you could try: 在jQuery中，您可以尝试：

$( "#check" ).html( 'First name must be filled out' );

Java脚本表单验证

问题描述

2 个解决方案

解决方案1
3 已采纳 2014-10-25 11:41:29

解决方案2
2 2014-10-25 11:42:17

Java脚本表单验证

问题描述

2 个解决方案

解决方案1 3 已采纳 2014-10-25 11:41:29

解决方案2 2 2014-10-25 11:42:17

解决方案1
3 已采纳 2014-10-25 11:41:29

解决方案2
2 2014-10-25 11:42:17