function logout(loc) {
	$('loginform').style.display = 'block';
	$('loginform').innerHTML = 'logging out...';

	var ajax = new Ajax.Updater(
         'loginform',        
         '/scripts/ajax/logout.php',        // URL
 	        {                // options
	         method:'post',
	         	postBody:'',
	             onComplete: showResponse
	             });

	function showResponse(req){
		var response = req.responseText;
		if (response == 'wrong') {
			$('loginform').style.display = 'block';
			$('loginform').innerHTML = response;
		} else {
			$('loginform').innerHTML = 'u bent uitgelogd';			
		}
		location.href=loc; 
	}

}