AJAX with PHP, no error not working

[dixo1]

Hello im doing a login box for a website. I heard AJAX are able to communicate with php and post data without refreshing the page. So i tryed this out:

 

(Brugernavn = Username, Kodeord = Password)

 

<script type="text/javascript">
function Login() {
    if (window.XMLHttpRequest) {
        xmlhttp=new XMLHttpRequest();
    }
    else {
        xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
    }
    xmlhttp.onreadystatechange=function()
    {
        if (xmlhttp.readyState==4 && xmlhttp.status==200)
        {
		if(xmlhttp.responseText == "Du er nu logged ind!") {
		    document.getElementById("answer").innerHTML=xmlhttp.responseText;
			setTimeout("location.reload(true);","2000");
		}
		else {
		    document.getElementById("answer").innerHTML=xmlhttp.responseText;
		}
        }
	else {
	    document.getElementById("answer").innerHTML="<img width='18px' height='18px' src='http://www.fairtrade-music.com/images/loading/loading.png' /> Logger ind...";
	}
    }
    xmlhttp.open("POST","data.php",true);
    xmlhttp.setRequestHeader("Content-type","application/x-www-form-urlencoded");
    xmlhttp.send("action=login&brugernavn=" + document.getElementById("brugernavn").value + "&kodeord=" + document.getElementById("kodeord").value);
document.getElementById("brugernavn").value="";
document.getElementById("kodeord").value="";
}
</script>

 

data.php:

<?php
function MysqlConnect()
{	
include("./_inc/config.php");

$link = mysql_connect($mysql_host, $mysql_user, $mysql_pass) or die(mysql_error());
mysql_select_db($mysql_db,$link) or die(mysql_error());
}
if($_GET['action'] == "login") {

if(!empty($_GET['brugernavn']) && !empty($_GET['kodeord'])) {

	$bruger_tegn = "#[^a-zA-Z0-9_\-]#";

	$brugernavn = strtoupper($_GET['brugernavn']);
	$kodeord = strtoupper($_GET['kodeord']);

	if(preg_match($bruger_tegn,$brugernavn)) {
		echo 'Brugernavn indeholder bannede tegn!';
	}else{
		if(preg_match($bruger_tegn,$kodeord)) {
			echo 'Kodeord indeholder bannede tegn!';
		}else{
			MysqlConnect();
			$brugernavn = mysql_real_escape_string($brugernavn);
			$kodeord = mysql_real_escape_string($kodeord);

			$query = mysql_query("SELECT brugernavn, kodeord FROM brugere WHERE brugernavn = '" . $brugernavn . "' AND kodeord = '" . $kodeord . "'") or die(mysql_error()); 
			$rows = mysql_num_rows($query) or die(mysql_error()); 
			if($rows == "1") {
				echo "Du er nu logget ind!";
			}else{
				echo "Forkert brugernavn eller kodeord!";
			}
		}
	}
}else{
	echo "Udfyld begge felter!";
}

}
?>

 

Hope someone can help me out, page ant doing anything. No messages are pasted into answer (div box).

[trq]

You are sending the data via POST yet looking for it within the $_GET array.

[dixo1]

Thx :] Did't see that one. Works perfectly now!