I am try to make login system this will check user name and password via php and ajax.i am showing what i have done.
Html
  <div class="container">
  <div id="show-error" style="display:none;" class="alert alert-warning"></div>
  <form  class="form-signin">
    <h2 class="form-signin-heading">Please sign in</h2>
    <input type="text" id="user" class="form-control" placeholder="Email address"  required autofocus>
    <input type="password" id="pass" class="form-control" placeholder="Password"  required>
    <a class="btn btn-lg btn-primary btn-block" onclick="submitfom();" >Sign in</a>
  </form>
JavaScript
function submitfom() {
$.ajax({
          type: "POST",
          url: "checking.php",
          data: {user: $("#user").val(),pass: $("#pass").val()},
       success: function(data){$('#show-error').css("display","inline");$('#show-error').html(data);},
       });
}
PHP
session_start();
include('../../../config.php');
     if((isset($_POST['user'])) && (isset($_POST['pass'])) ){
     $user = $_POST['user'];
     $pass = $_POST['pass'];
     $query = mysql_query("SELECT user FROM admin_user WHERE user ='".$user."' ");
     $query2 = mysql_query("SELECT pass FROM admin_user WHERE pass ='".$pass."' ");
       $result= mysql_num_rows($query);
       $result2= mysql_num_rows($query2);
        if((!empty($result)) && (!empty($result2))){
        $_SESSION['admin']=$user;
      echo "Welcome ". $_SESSION['admin'];
       header('Location: ../../index.php');
        }
        else {echo "Please Write correct <strong>username and password</strong>";}
     }
       else "Some thing miss";
Every thing work fine but now i just need when user write correct username and password than i just need redirection.I am using header location function but actually i am send form values via ajax that's why my redirection not working.i don't know why please help.
 
     
     
     
    