browser = (((navigator.appName == "Netscape") && (parseInt(navigator.appVersion) >= 3 )) || ((navigator.appName == "Microsoft Internet Explorer") && (parseInt(navigator.appVersion) >= 4 )))

	if ( browser) {

	unt_off = new Image;
	unt_off.src = "images/menu_unternehmen.gif";
	unt_on = new Image;
	unt_on.src = "images/menu_unternehmen_on.gif";

	einr_off = new Image;
	einr_off.src = "images/menu_einrichtungen.gif";
	einr_on = new Image;
	einr_on.src = "images/menu_einrichtungen_on.gif";

	pfl_off = new Image;
	pfl_off.src = "images/menu_pflege.gif";
	pfl_on = new Image;
	pfl_on.src = "images/menu_pflege_on.gif";

	ir_off = new Image;
	ir_off.src = "images/menu_ir.gif";
	ir_on = new Image;
	ir_on.src = "images/menu_ir_on.gif";

	news_off = new Image;
	news_off.src = "images/menu_news.gif";
	news_on = new Image;
	news_on.src = "images/menu_news_on.gif";

	kon_off = new Image;
	kon_off.src = "images/menu_kontakt.gif";
	kon_on = new Image;
	kon_on.src = "images/menu_kontakt_on.gif";

	}

	function Swap(imgDocID,imgObjName) {
	    if ( browser) {
            document.images[imgDocID].src = eval(imgObjName + ".src")
            }
	}