URGENT: Problem with login in php with javascript modalbox

I have created a modal login to my php project.
Modalen display correctly, but the problem is that when the login button is pressed it goes to the page I have to refer to, but it does not come up any information / echo message.

When I test adding the code to a blank page, without javascript Modalbox, then it works perfectly. But as soon as I put the login table and the code in Modalen the php coding is not working anymore. I do not know what's wrong with it, whether it's because of modalbox or, I need to make the code slightly so that it adapts modalbox?

The only feature works here when I click the login button with empty input fields. Then I get error message that the fields must be filled. Otherwise it does not look like the code works in modalbox.

It very urgent. Hoping for a quick response

Thanks in advance.

****HTML CODE****

index.php

<!--Start of customer login-->
<form name="form1" method="post" action="phpFiler/min_konto.php">

<div id="boxes">

   
<!-- Start of Login Dialog --> 
<div id="dialog1" class="window">
<div id="close"> <input type="image" value="X" class="close" src="image/X.png" /></div>
  <div class="d-header">

  <div id="login_heading"></div>
  <input name="brukernavn" type="text" id="brukernavn" onclick="this.value=''">
  <input name="passord" type="password" id="passord" onclick="this.value=''">
</div>
<div class="d-blank">
  <table width="356" border="0" cellspacing="0" cellpadding="0">
  <tr>
  <td  align="left" width="6"></td>
    <td  align="left">
    <input type="checkbox" name="husk">
<font size="2">Husk meg<br />    <INPUT type="button" value="Glemt passord" onClick="window.location.href='glemtpassord.htm'"> <br /><a href="leggtilbrukere.php" name="modal">Registrer</a></td>
<td  align="left" width="10"></td>
    <td align="left"><input type="submit" name="submit" value="Login" src="image/loginBtn.png">  </td>
  </tr>
</table>

  </div>
  <div class="d-login"><br/>    </div>
</div>
<!-- End of Login Dialog --> 
<!-- Mask to cover the whole screen -->
  <div id="mask"></div>
</div>
</form>
<!-- Mask to cover the whole screen -->
  <div id="mask"></div>
</div>
<div style="clear:both;"></div>

</div>

Code (markup):

***PHP CODE****

min_konto.php

<?php 

$connect = mysql_connect(XXXXX);
mysql_select_db('XXXXX',$connect);

function displayLogin(){
   global $logged_in;
   if($logged_in){
      echo "<h1>Logged In!</h1>";
      echo "Welcome <b>$_SESSION[brukernavn]</b>, you are logged in. <a href=\"loggut.php\">Logout</a>";
   }
   else{
?>

<table width="300" border="0" align="center" cellpadding="0" cellspacing="1">
<tr>
<td><form name="form1" method="post" action="">
<table width="100%" border="0" cellspacing="1" cellpadding="3">
<tr>
<td colspan="3"><center><strong>Login </strong></center></td>
</tr>
<tr>
<td width="71">Brukernavn</td>
<td width="6">:</td>
<td width="301"><input name="brukernavn" type="text" id="brukernavn" <?php if(isset($_COOKIE['cooknavn'])) echo 'value="'.$_COOKIE['cooknavn'].'"';?></td>
</tr>
<tr>
<td>Passord</td>
<td>:</td>
<td><input name="passord" type="password" id="passord" <?php if(isset($_COOKIE['cookpass'])) echo 'value="'.$_COOKIE['cookpass'].'"';?> /></td>
</tr>
<tr>
<td colspan="2" align="left"><input type="checkbox" name="husk">
<font size="2">Husk meg</td>
<td colspan="3" align="center"><input type="submit" name="submit" value="Login"> <a href="glemtpassord.php">Glemt passord?</a>
</tr>
</table>
</form>
</td>
</tr>
</table>
<?php
   }
   }
$brukernavn = trim($_REQUEST['brukernavn']);
$ukryptert_passord = trim($_REQUEST['passord']);
$passord =md5(trim($_REQUEST['passord']));

if (isset($_REQUEST[submit]))
{
   /* ser om alt er skrevet inn */
   if(!$_POST['brukernavn'] || !$_POST['passord']){
      die("Brukernavn og Passord må være utfylt!<br /> <a href='login.php'>Tilbake</a>");
   }
  
  $sql = "SELECT * FROM login WHERE BRUKERNAVN LIKE '".$brukernavn."' AND PASSORD LIKE '".$passord."'";

   
   $resultat = mysql_query($sql);
   
   $antall = mysql_num_rows($resultat);
function checkLogin(){
   /* Check if user has been remembered */
   if(isset($_COOKIE['cooknavn']) && isset($_COOKIE['cookpass'])){
      $_SESSION['brukernavn'] = $_COOKIE['cooknavn'];
      $_SESSION['passord'] = $_COOKIE['cookpass'];
   }

   /* Username and password have been set */
   if(isset($_SESSION['brukernavn']) && isset($_SESSION['passord'])){
      /* Confirm that username and password are valid */
      if(confirmUser($_SESSION['brukernavn'], $_SESSION['passord']) != 0){
         /* Variables are incorrect, user not logged in */
         unset($_SESSION['brukernavn']);
         unset($_SESSION['passord']);
         return false;
      }
      return true;
   }
   /* User not logged in */
   else{
      return false;
   }
}

//Husk meg funksjon i 1 dag.

   if(isset($_POST['husk'])){
       setcookie("cooknavn", $_SESSION['BRUKERNAVN'], time()+3600*24, "/");
       setcookie("cookpass", $ukryptert_passord, time()+3600*24, "/");
    } 

//Magic quotes 
//echo "Er magic quotes satt? : ".get_magic_quotes_gpc()."<br/>";
    
    if (!get_magic_quotes_gpc()) 
    {
        $brukernavn = mysql_escape_string($brukernavn);
        $passord = mysql_escape_string($passord);
    }
    
    $sqlsetning = "DELETE * FROM login WHERE BRUKERNAVN = '$brukernavn' AND PASSORD> '$passord'";
    
}
$logged_in = checkLogin();

?>  

Code (markup):

JAVASCRIPT - MODAL
//LOGIN MODAL
$(document).ready(function() {   

   //select all the a tag with name equal to modal
   $('a[name=modal]').click(function(e) {
      //Cancel the link behavior
      e.preventDefault();
     
      //Get the A tag
      var id = $(this).attr('href');
   
      //Get the screen height and width
      var maskHeight = $(document).height();
      var maskWidth = $(window).width();
   
      //Set heigth and width to mask to fill up the whole screen
      $('#mask').css({'width':maskWidth,'height':maskHeight});
     
      //transition effect   
     
      //Den fader in til helt blank side   
      /*$('#mask').fadeIn(1000);   */
     
      //Den fader ut til lys side
      $('#mask').fadeTo("slow",0.8);   
   
      //Get the window height and width
      var winH = $(window).height();
      var winW = $(window).width();
             
      //Set the popup window to center
      $(id).css('top',  winH/2-$(id).height()/2);
      $(id).css('left', winW/2-$(id).width()/2);
   
      //transition effect
      $(id).fadeIn(2000);
   
   });
   
   //if close button is clicked
   $('.window .close').click(function (e) {
      e.preventDefault();
      $(this).hide();
      $('.window').hide();
   });   
   
   /*$('.window.reg').click(function (e) {
   
      windows.location('phpFiler/registrer.php');
    });
   */

     
   //if mask is clicked
   $('#mask').click(function () {
      $(this).hide();
      $('.window').hide();
   });         
   
});

Code (markup):

 

Simply because you're not calling the displayLogin function, nowhere in min_konto.php.
Also I'd advice you to change your code;
- SQL injections will love your code.
- You ain't checking if the user/pass exists, you do have "$antall = mysql_num_rows($resultat);" but no if statement.