Parent-Child problem [javascript]

[PeTkO]

Pozdrav,

Pre svega zelim svima da pozelim srecnu Novu godinu

Imam sledeci problem. Na jednoj strani imam link koji otvara popup prozor u kome se pojavljuje twitter aplikacija za prijavljivanje. Nakon klika na "Allow" popup prozor se zatvara, JS funkcija prikuplja $GET parametre iz URL-a, prosledjuje maticnoj strani i refresuje je sa dodatkom prikupljenih parametara. Problem je sledeci...nakon refresovanja maticne strane, ona ponovo poziva funkciju koja prikuplja $_GET parametre iz URL-a i u konzoli dobijam gresku "Cannot read property 'location' of null"...Evo koda, nadam se da cete mi pomoci

<?php
session_start();
require_once 'include/twitter.class.php';
echo "Dobrodosli ".$_SESSION['login']."! <br />";
?>
<script type="text/javascript"> 
function twitter()
{
	
	window.open('./login.php?action=twitter','myWin','scrollbars =yes, width=500,height=500');
	window.onClick = function(){self.close()};
}
function gup( name )
{
  name = name.replace(/[\[]/,"\\\[").replace(/[\]]/,"\\\]");
  var regexS = "[\\?&]"+name+"=([^&#]*)";
  var regex = new RegExp( regexS );
  var results = regex.exec( window.location.href );
  if( results != null )
	  return results[1];
  
    
}

function callTwitter()
{
	var a = gup('oauth_verifier');
	var b = gup('oauth_token');
	
		window.close();
		window.opener.location.search = '?oauth_token='+b+'&oauth_verifier='+a;
		
	
}
</script>
<a href="javascript:;" onClick="twitter();">Open Window</a>
<?php 
echo '

<a href="?action=twitter">Register Twitter</a><br />
<form action="login.php" method="post">
<input type="submit" name="logout" value="Log Out"/>
</form>
';
if(isset($_POST['logout']))
{
	unset($_SESSION['login']);
	unset($_SESSION['konektovan']);
	session_unset();
	header( "refresh:1;url=index.php" );
}
if(isset($_GET['action'])=="twitter")
{
	
	$t = new Twitter();
	$t->twitterLogin();
}


if(!empty($_GET['oauth_verifier']) && !empty($_SESSION['oauth_token']) && !empty($_SESSION['oauth_token_secret']))
{
		
	
		echo '<script type="text/javascript">callTwitter();
		</script>';
	
	
		
		echo 'Uspesno konektovanje sa twitterom';
		
		
		
		
	}
	



?>

Twitter funckija

<?php 
include_once("db.class.php");
include_once("twitteroauth.php");
class Twitter
{
	function twitterLogin()
	{
		// The TwitterOAuth instance
		$twitteroauth = new TwitterOAuth('uAVGfCIg9YqVhrmd5Rq1w', '9iqj4SBerAbcJ0uUnnbaAZn2o9OPFiTmIE9VVErJRy0');
		// Requesting authentication tokens, the parameter is the URL we will be redirected to
		$request_token = $twitteroauth->getRequestToken('http://localhost/sea/login.php');
		// Saving them into the session
		
		$_SESSION['oauth_token'] = $request_token['oauth_token'];
		$_SESSION['oauth_token_secret'] = $request_token['oauth_token_secret'];
		// If everything goes well..
		if($twitteroauth->http_code==200)
		{
			// Let's generate the URL and redirect
			
			$url = $twitteroauth->getAuthorizeURL($request_token['oauth_token']);
			$_SESSION['konektovan'] = "Konektovan";
			header('Location: '. $url);
		} else 
		{
			// It's a bad idea to kill the script, but we've got to know when there's an error.
			die('Something wrong happened.');
		}
	}
	function registerTwitter($username)
	{
		$config = new config("localhost", "root", "", "seadb", "sea_", "mysql");
		$db = new Db($config);
		$db->openConnection();
		if($db->pingServer() == true)
		{
			$sql = $db->query("INSERT INTO {twitter}(id) SELECT id FROM {user} WHERE username='".$username."'");
		}
	}
}
?>