$(document).ready(function() {
// default on load
$('#contenttext').load("inhalt/startpage.php", function(response, status, xhr) {
	  if (status == "error") {
	    var msg = "Sorry but there was an error: ";
	    $("#content").html(msg + xhr.status + " " + xhr.statusText);
	  }
	});

   $('a[menu|=true]').click(function() {
	var idString = "inhalt/"+ $(this).attr("id") +".php";

	$('#contenttext').load(idString, function(response, status, xhr) {
	  if (status == "error") {
	    var msg = "Sorry but there was an error: ";
	    $("#contenttext").html(msg + xhr.status + " " + xhr.statusText);
	  }
	});
   });
 });