jquery ajax error -

i wrote login form on submit user supposed logged in, not working. please let me know error is, form

<form id ="loginform_" action="">     <a href=""id="slidedownclose">x</a>     <h2> login form</h2>     username:<input type="text" id="uname" name="user_name"  /><br/><br/>     password:<input type="password" id="password" name="password" /><br/><br/>     <input type ="submit" id ="log"  class="logclass" value="log in"/><br/><br/>     <a id ="lost_password" href ="/frontend_dev.php/forgotpassword">forgot password </a> </form> 

this jquery code

$(document).ready(function() {     $("#loginform_").validate({         rules: {             user_name: "required",             password: "required"         }     });     $(".logclass").click(function()     {         var data =$("#loginform_").serialize();         $.ajax({             type: "post",             url: "/frontend_dev.php/login/new",             data: data,             success: function(){                 alert('success');                 window.location.replace("/frontend_dev.php/user");             },             error: function(){                 alert(data);             }         });     }); }); 

well 1 of problems button of type submit , not telling prevent default behavior.

$(".logclass").click(function(e) {    // code    e.preventdefault();   } 

next it's better use following call click.

$('#log').click(function(e){  } 

it's better access id class. option change button like.

<input type='button' id='log' class='logclass' value='log in'/> 

that should started in better direction.