Trop d'espace

Bonjour, j'ai un fichier php d'inscription et puis quand je l'affiche sur mon site il y a trop d'espace la boite d'inscription est completement en bas il faut faire defiler pour aller rejoindre la boite d'inscription voici le code


<?php

define("IN_SITE",true);

define("LEVEL",2);

include("header.php");



if(isset($_POST['add'])){

if(find_user($_POST['add'])!=-1)

echo display_error("This user is already existing.",300);

else{

if($fp = @fopen($pass_filename,"a")){

$authorized_letter = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";

$new_pass = "";

for($i=0;$i<8;$i++)

$new_pass .= $authorized_letter[mt_rand(0,strlen($authorized_letter)-1)];

fputs($fp,"\n".$_POST['add']."\t".md5($new_pass)."\t"."0");

fclose($fp);

echo display_table("Create User",300);

echo "<tr bgcolor=\"".next_color()."\"><td align=\"center\">User Successfully Created</td></tr>";

echo "<tr bgcolor=\"".next_color()."\"><td align=\"center\">Temporary Password : <b><font color=\"#ff0000\">".$new_pass."</font></b></td></tr>";

echo "<tr bgcolor=\"".next_color()."\"><td align=\"center\"><a href=\"users.php?\">See Users</a></td></tr>";

echo display_table();

}

else

echo display_error("The file ".$pass_filename." can't be written.",300);

}



}

elseif(isset($_GET['del'])){

if($user_id!=$_GET['del']){

if($fp = @fopen($pass_filename,"w")){

$towrite = "";

for($i=0;$i<count($user);$i++)

if($_GET['del']!=$i)

$towrite .= $user[$i]['login']."\t".$user[$i]['password']."\t".$user[$i]['level']."\n";

$towrite = trim($towrite);

fputs($fp,$towrite);

fclose($fp);

echo "<meta http-equiv=\"refresh\" content=\"2; url=users.php?\">";





}

else

echo display_error("The file ".$pass_filename." can't be written.",300);

}

else

echo "<center><a href=\"users.php\">Back</a></center>";



}

else{



for($i=0;$i<count($user);$i++)



echo display_table();

echo "<form action=\"".$_SERVER['PHP_SELF']."\" method=\"post\">";

echo display_table("Add User",300);

echo "<tr bgcolor=\"".next_color()."\"><td align=\"center\"><input type=\"text\" name=\"add\"></td></tr>";

echo "<tr bgcolor=\"".next_color()."\"><td align=\"center\" colspan=\"2\"><input type=\"submit\" value=\"New User\"></td></tr>";

echo display_table();

echo "</form>";

echo "<p><center><a href=\"index.php\">Back</a></center>";

}



include("footer.php");

?>



merci de m'aider