vor = new Image();
    vor.src = "pic_room/vor.png";    
    vorover = new Image();
    vorover.src = "pic_room/vor_over.png";
    
    linker = new Image();
    linker.src = "pic_room/links.png";
    linkerover = new Image();
    linkerover.src = "pic_room/links_over.png";

    rechts = new Image();
    rechts.src = "pic_room/rechts.png";   
    rechtsover = new Image();
    rechtsover.src = "pic_room/rechts_over.png";
    


    function LinksOver (NeueSource) {
        if (document.getElementById)
        document.getElementById("imglinks").src = NeueSource.src;
    }
    function RechtsOver (NeueSource) {
        if (document.getElementById)
        document.getElementById("imgrechts").src = NeueSource.src;
    }
    function VorOver (NeueSource) {
        if (document.getElementById)
        document.getElementById("imgvor").src = NeueSource.src;
        document.getElementById("imgnextroom").style.visibility = "visible";
    }   
    function VorOut (NeueSource) {
        if (document.getElementById)
        document.getElementById("imgvor").src = NeueSource.src;
        document.getElementById("imgnextroom").style.visibility = "hidden";
    }
    
	   function PopupOpen (Adresse, Name) {
  		Popup1 = window.open(Adresse, Name, "width=670,height=770,left=50,top=70,status=no,scrollbars=yes,resizable=yes");
  		Popup1.focus();
	}