function click (e) {
  if (!e)
    e = window.event;
  if ((e.type && e.type == "contextmenu") || (e.button && e.button == 2) || (e.which && e.which == 3)) {
    if (window.opera)
      window.alert("Copyright Mohn-GmbH");
    return false;
  }
}
if (document.layers)
  document.captureEvents(Event.MOUSEDOWN);
  
document.onmousedown = click;
document.oncontextmenu = click;


function checkNlAddForm() {
	var adresse = document.getElementById("nl_add_input").value;
	
	if(adresse == 'E-Mail Adresse...') {
		alert('Bitte tragen Sie zuerst Ihre E-Mail Adresse ein!');
		return false;
	} else {
		return true;
	}
	
}

//News Kategorien steuern (hide/show):
function ShowHideKats() {
	if(document.getElementById("news-catmenu").kh == 0) {
	  // zu, also aufklappen
	  document.getElementById("news-catmenu").style.display = 'block';
	   document.getElementById("news-catmenu").kh = 1
	} else {
	  if(document.getElementById("news-catmenu").kh == 1) {
	    // auf, also zuklappen.
	    document.getElementById("news-catmenu").style.display = 'none';
	     document.getElementById("news-catmenu").kh = 0
	  }
	}
}

function switchlayer(listr) {
  var FK = document.getElementById? 1:0 ;
  var NS = document.layers? 1:0 ;
  var IE = document.all? 1:0 ;

  if (FK)
       {document.getElementById(listr).style.display=
	   (document.getElementById(listr).style.display=='block') ? 'none' : 'block';}
  else if (NS)
       {document.layers[listr].display=(document.layers[listr].display==
	   'block') ? 'none' : 'block';}
  else if (IE)
       {document.all[listr].style.display=(document.all[listr].style.display==
	   'block') ? 'none' : 'block';}
	   
  /*
  if($(listr).style.display == "block") {
    $(listr).style.display = "none";
  } else {
    $(listr).style.display = "block";
  }
  */
}