I use the JQuery Validation plugin to validate a form (http://docs.jquery.com/Plugins/Validation/)
For example, I can validate an email in a form.
What I would like to do is to validate if the username chosen already exists. So, I need to call a server method that query the database. How can I do that ?
UPDATE
From balexandre answer,...
            
           
          
            
            <% Html.BeginForm("Index", "Home", FormMethod.Post, new { id = "form_logon" }); %>
or
<form id = "form_logon", action="/Home/Index" method="post">
just don't work.
Pressing a submit button if ID is present does nothing, while id is required for jQuery validation plugin.
...
            
           
          
            
            i try to customize the rule of the JQuery validation plugin and I'm almost done. The only problem I got is that the function $("<%=txtUserl.UniqueID %>").val() return undefined. How can I get the value of that textbox ?
$("#aspnetForm").validate
(
    {
        rules:
        {
            <%=txtUser.UniqueID %>: 
            {
        ...
            
           
          
            
            With the JQuery Validation Plugin is it possible to print 'Ok' when the field is correct? When there's an error, I can show a customizable error message. Is the same thing possible when there's no error in the field and it's content is valid (I mean it's not empty) ?
UPDATE
Here's an example of what I want to achieve : Example. When th...
            
           
          
            
            I Have a large form with hidden divs, an initial select menu reveals the appropriate div (reduced to just one option here for brevity)... when that containing div is made visible I want to use the validate plugin to validate the next select menu.
I use this rule, which works for the initial select menu  
salesProduct: {
    required: "...
            
           
          
            
            I'm using the jQuery.validate() to validate my form before it is submitted.
Now that I am using Ajax to submit my form, I have a problem.
Note: I am not using the jQuery form plugin. Just so that is clear :)
The jQuery.validate() is fired, but the form submission is also executed.
I don't want the form to be submitted until the valida...
            
           
          
            
            I want to manually trigger validation including showing error messages with jQuery Validate.
The scenario i am trying to accomplish is a form like this:
<form>
 <input id=i1> <button id=b1>
 <input id=i2> <button id=b2>
</form>
When clicking b1, only i1 should be validated. hen clicking b2, only i2 should be validated. However all fi...
            
           
          
            
            How to validate a bunch of fields that are not enclosed by FORM tag using jquery validate?
...
            
           
          
            
            I have a page that has a Contact Form slide down when a link is clicked (i.e. it is a div on the page that displays with .slideDown('slow')
I have the jQuery validation plugin working on the contact form, only I noticed that when I was testing I had event.preventDefault(); commented out.  In the final version I want that to be uncomment...
            
           
          
            
            Hi,
I have a form that's checked by jquery validate.  The field that's causing some issue looks like this:
<label>Select an Account Type<</label><br>
<input type="radio" name="accountType" value="1" id="accountType_C"><label id="accountType_C" for="accountType_C">Coder</label>
<input type="radio" name="accountType" value="0" id="accou...
            
           
          
            
            Hi
I have a jquery ui dialog with a form inside. If I call the validate method of the jquery.validate plugin, tabbing inside the form fields strangely submits the form.
If I remove the call to validate, the odd behaviour dissapears, but then I would have to validate by hand.
Any ideas why? 
Can't post code right now, but could create...
            
           
          
            
            I am using the jquery validation and i need to validate an email.
I use
    $("#myForm").validate({
     rules: 
      email: {
       required: true,
       email: true
      }
})
SO FAR so good. The problem is that i need to make an ajax call to verify if given email already exist.If exist display message "This email already exits....
            
           
          
            
            Hi i am trying to validate a form with jquery validation and at the same type validate form fields that came from an ajax call.
Here is the situaton
<input type="radio" onclick="load extra fields 1"> Radio 1
<input type="radio" onclick="load extra fields 2"> Radio 2
So when i select one radio i get bellow extra fields and i want to v...
            
           
          
            
            I'm using jQuery Validate, but I really don't want to have any error messages whatsoever. Rather, I need to have red boxes around offending inputs/selects/etc. These red boxes were a piece of cake to add, but I still cannot remove error messages themselves. How do I disable them altogether?
...
            
           
          
            
            I am having troubles with jQuery's load function and am hoping for some help.  I just started testing a site I built in IE to debug/hack/etc to make sure it works.  Firefox/safari/etc all work great.  .load won't work for me though.  It just seems to hang.  Would love some help.
Here is a simplified version of the problem:
<!DOCTYPE HT...
            
           
          
            
            Context: Using Asp.net 2.0 webforms, Jquery 1.3.2 and BlockUI and Validation plugins.
I have a Gridview which is databound with some html buttons and then these buttons are wired up in jquery so that when clicked, blockUI displays a div with various inputs. When the modal is submitted, I am using the Validate plug-in to validate the inp...
            
           
          
            
            I want the JQuery validate plugin to only display the validation messages only upon form submit and not when the focus from a input field is lost. How do i achieve this?
Right now I am following this pattern, which leads to validation after lost focus event:
<html>
<head>
 <script>
  $(document).ready(function(){
    $("#commentForm")....
            
           
          
            
            I have a registration form for a website that needs to check if an email address already exists for a given company id. When the user tabs or clicks out of the email field (blur event), I want jQuery to go off and do an AJAX request so I can then warn the user they need to pick another address.
In my controller, I have a method such as ...
            
           
          
            
            I'm using the jQuery validation plugin in a very similar manner to the Remember The Milk demo.
$("#registrationForm").validate({
  rules: {      
    email: {
      required: true,
      email: true,
      remote: '<%=Url.Action(...) %>'
    },        
  },
  messages: {
    email: {
      required: "Please enter an email address",
    ...
            
           
          
            
            Hi all, 
could you take a look at this http://jsbin.com/osolo/ please? 
If you enter a letter in Min Age rather than a number then hit submit this validates using jquery validator using a regular expression in a custom validation method, this works but i'm now looking to make it a little more dynamic.  
In the custom validation method...