Need Help Quick Someone Please Help Me With This Form Validation

[jalvini]

I have a script running on my site for member signup on my site my user profile pages are in the following format http://coupo.org/members/profile.php?u=Leika

The signup form is written in the following manor:

			<div id="major">

			<div class="panel" id="merchantIntro">
				<div class="inner">


            <table cellpadding="0" cellspacing="0" width="100%">
									<tr>
										<td height="0px">
                                       <h1> Sign up Today And Start Saving!</h1>
										<br>
										</td>
									</tr>
									<tr><td height="0px">

									</td></tr>
									<tr>
										<td style="color:#555555;font-size:14px;padding:0 5px 0 5px;background-repeat:repeat">
										<form method="post" action="regAction.php" name="member" onsubmit="return validateForm()">

                                        		<tr><td height="8px" style="background-repeat:repeat"></td></tr>
									<tr>
										<td style="color:#555555;font-size:14px;padding:0 5px 0 5px;background-repeat:repeat">
                                        UserName
                                        </td>
									</tr>
									<tr>
                                        <td style="color:#666666;font-size:13px;padding:0 5px 0 5px;background-repeat:repeat">

<script type="text/javascript"> 
  //function to create ajax object
  function pullAjax(){
    var a;
    try{
      a=new XMLHttpRequest()
    }
    catch(b)
    {
      try
      {
        a=new ActiveXObject("Msxml2.XMLHTTP")
      }catch(b)
      {
        try
        {
          a=new ActiveXObject("Microsoft.XMLHTTP")
        }
        catch(b)
        {
          alert("Your browser broke!");return false
        }
      }
    }
    return a;
  }

  function validate()
  {
    site_root = '';
    var x = document.getElementById('ucode');
    var msg = document.getElementById('msg');
    user = x.value;

code = '';
message = '';
obj=pullAjax();
obj.onreadystatechange=function()
{
  if(obj.readyState==4)
  {
    eval("result = "+obj.responseText);
    code = result['code'];
    message = result['result'];

    if(code <=0)
    {
      x.style.border = "1px solid red";
      msg.style.color = "red";
    }
    else
    {
      x.style.border = "1px solid #000";
      msg.style.color = "green";
    }
    msg.innerHTML = message;
  }
}
obj.open("GET",site_root+"validate.php?username="+user,true);
obj.send(null);
  }
</script> 
<style> 
#ucode{border: 1px solid #000;}
</style> 
<input type="text" id="ucode" name="ucode" value="" /> 
<input type="button" onclick="validate();" value="Check Availability" /> 
<div id="msg"></div>					

The validation side is written like this:

<?php
$user = strip_tags(trim($_REQUEST['username']));

if(strlen($user) <= 0)
{
  echo json_encode(array('code'  =>  -1,
  'result'  =>  'Invalid username, please try again.'
  ));
  die;
}

// Query database to check if the username is available
$query = "Select * from users where codename = '$user' ";
// Execute the above query using your own script and if it return you the
// result (row) we should return negative, else a success message.

$available = true;

if($available)
{
  echo json_encode(array('code'  =>  1,
  'result'  =>  "Success,username $user is still available"
  ));
  die;
}
else
{
  echo  json_encode(array('code'  =>  0,
  'result'  =>  "Sorry but username $user is already taken."
  ));
  die;
}
die;
?>

Now everytime I try to puch the button to check availability it returns true everytime. Can someone tell me where I went wrong.

BTW the username field in the MySQL DB is called codename.

Someone please help me I am drowning here 🙁

Thanks Ahead....

[jalvini]

BTW the Form is on the Page http://coupo.org/members/logReg.php

[dalecosp]

Without being too facetious or condescending, did you notice the following?

$available = true;

if($available)

You set $available to true and then immediately test it, and the second part of that loop will never happen ... it will always be the top, leading to the very effect you describe.