function CheckAuswahl (form, module, action, session, returnlink) {
			var url = false;
			var session_id = session;
			var returnlink = returnlink;
			
			if(!session_id || session_id == "") {
				alert('Fehler, keine Session übergeben!');
				return;
			}
			
			if(action == 'catview' || action == 'catedit' || action == 'catdelete') {
				var itemid = document.forms[form].elements[module+'categories'].value;
				
				if(!itemid ||  itemid == "none") {
					alert('Bitte wählen Sie zuerst eine Kategorie aus der Liste aus.');
					document.forms[form].elements[module+'categories'].focus();
					return;
				}
			
			} else {
				var itemid = document.forms[form].elements[module].value;
				
				if(!itemid ||  itemid == "none") {
					alert('Bitte wählen Sie zuerst einen Eintrag aus der Liste aus.');
					document.forms[form].elements[module].focus();
					return;
				}
			}
			
			switch (action){
				case "view":
					url = '../'+module+'/itemshow.php4?query=id%3D'+itemid+'&method=2&return='+returnlink+'&sessionid='+session+'';
				break;
				case "edit":
					url = '../'+module+'/itemeditform.php4?action=edit&id='+itemid+'&return='+returnlink+'&sessionid='+session+'';
				break;
				case "delete":
					url = '../'+module+'/itemdelete.php4?id='+itemid+'&return='+returnlink+'&sessionid='+session+'';
				break;
				case "catview":
					url = '../'+module+'/categoryeditform.php4?action=edit&id='+itemid+'&return='+returnlink+'&sessionid='+session+'';
				break;
				case "catedit":
					url = '../'+module+'/categoryeditform.php4?action=edit&id='+itemid+'&return='+returnlink+'&sessionid='+session+'';
				break;
				case "catdelete":
					url = '../'+module+'/categorydelete.php4?id='+itemid+'&return='+returnlink+'&sessionid='+session+'';
				break;
			}
	window.location.href=url;
}