var PopUp=false;

function popup_focus(){
  if(PopUp&&PopUp.closed==false){
    window.PopUp.close()
    }
  }

function openPopUp(URL,NAME,WIDTH,HEIGHT,SB){
  if (SB){}else SB="yes";
  if (HEIGHT){}else HEIGHT=400;
  if (WIDTH){}else WIDTH=600;
  OPT="height="+HEIGHT+",width="+WIDTH+",scrollbars="+SB;
  PopUp=window.open(URL,NAME,OPT);
  PopUp.focus();
  return;
  }
function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}

function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		beckmann_1_ebene_1_over = newImage("images/beckmann-1_ebene-1-over.jpg");
		preloadFlag = true;
	}
}