[jQuery] Retreiving values from Jquery to a controller in cakephp

[jQuery] Retreiving values from Jquery to a controller in cakephp


hai guys am new to this and dont know how to get the values from
jquery to a controller in php
i will xplain
my simple login form is as follows
//////////////////////////////////////////////////////////////////////
<form method="post" action="" id="customForm" name="customForm">
<table cellpadding="0" cellspacing="10">
<tr><td>User Name :</td><td><input id="username" name="username"
type="text" /></td><td><span id="usernameInfo"></span></td></tr>
<tr><td>Password :</td><td><input id="password" name="password"
type="password" /></td><td><span id="passwordInfo"></span>
</td></tr>
<tr><td colspan="2" align="right"><input id="submit" name="submit"
type="submit" value="Log In" /></td></tr>
</table>
</form>
//////////////////////////////////////////////////////////////////////
am using cakephp
and my javascript for this form is
/////////////////////////////////////////////////////////////
var form = $("#customForm");
form.submit(function(){
    if(validateUserName() & validatePassword() )
        {
             var options = {
                        type: "POST",
                        url: "http://localhost/jeffery/cake_jquery/users/login",
                        success: function() {
                            alert('Thanks for your comment!');
                        }
                    };
             var queryString = $('#customForm').formSerialize();
             alert(queryString);
             $(this).ajaxSubmit(options);
         //return false;
        }
        return false;
});
////////////////////////////////////////////////////////////
my problem is am able to see my values before submitting thru
alert....
but i would like to see this value in my users controller with login
function
i dont know how???