即使没有提交按钮，在chrome中点击任何文本框的输入都会触发表单提交。

Question

I am building a site which uses jQUery validation plugin and want things validated before submitting the form. My code looks like follows

<form>
  <input type="button" value="Submit the Form" onclick="validateAndSubmit()" />
</form>
<script language="javascript">

   function validateAndSubmit(){
   //do some validation and then submit 
 }

</script>

In Firefox, this works perfectly. In Chrome, when I hit enter anywhere in the page, the form submit is triggered and validation doesn't work either. Is there something to avoid this ? Shouldn't the browser not submit a form when we hit an enter if there is no submit button?

Answer 1

use this syntax:

<form onsubmit="return validateAndSubmit()">
...

if you need to catch the return-key maybe you can handle it by binding an keydown event to the input and perform some action on keyCode #13

Answer 2

Try this method:

<form onsubmit="return validateAndSubmit(this);">
  <input type="submit" value="Submit the Form"/>
</form>
<script language="javascript">

   function validateAndSubmit(form_obj){
     if(some_variable == 'correct_value') {
        form_obj.submit();
        return true;
     } else {
        alert('Wrong value');
        return false;
     }
   //do some validation and then submit 
 }

</script>

Answer 3

I'm not sure if there's a standard regarding this or not.

Regardless, you can save yourself the trouble altogether by simply adopting a stronger strategy: implement the validation as an onsubmit action on the form, rather than an onclick action for the button. I almost never use buttons in forms; having to do so for yours would only throw me off, and that's not good for users.

So anyway. Form onsubmit is the way to go. And I'd appreciate it if you used unobtrusive Javascript instead of the HTML attributes :)