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) {
		ol = newImage("images/but_ol-on.gif");
		hof = newImage("images/but_hof-on.gif");
		de = newImage("images/but_de-on.gif");
		en = newImage("images/but_en-on.gif");

		but1 = newImage("images/ol_aktuell-on.gif");
		but2 = newImage("images/ol_angebote-on.gif");
		but3 = newImage("images/ol_english-on.gif");
		but3a = newImage("images/ol_englishhome-on.gif");
		but4 = newImage("images/ol_hoflitzibuch-on.gif");
		but5 = newImage("images/ol_kontakt-on.gif");
		but6 = newImage("images/ol_projekte-on.gif");
		but7 = newImage("images/ol_publikationen-on.gif");
		but8 = newImage("images/ol_sinnesgaerten-on.gif");
		but9 = newImage("images/ol_ueberuns-on.gif");
		but10 = newImage("images/ol_begruenungen-on.gif");

		but11 = newImage("images/willkommen-on.gif");
		but12 = newImage("images/welcome-on.gif");

		but21 = newImage("images/en_aboutus-on.gif");
		but22 = newImage("images/en_services-on.gif");
		but23 = newImage("images/en_projects-on.gif");
		but24 = newImage("images/en_research-on.gif");
		but25 = newImage("images/en_development-on.gif");
		but26 = newImage("images/en_contact-on.gif");
		but27 = newImage("images/en_deutsch-on.gif");

		preloadFlag = true;
	}
}


/* scripts and code for navigation - Copyright (C) 2003 Greg Samson - mypants.com */

function setVisibility(objectID,state) {
	dom = findDOM(objectID,1);
	dom.visibility = state;
}

function toggleVisibility(objectID) {
	var dom = findDOM(objectID,1);
	state = dom.visibility;
	if (state == 'hidden' || state == 'hide' ) { dom.visibility = 'visible'; }
	else {
		if (state == 'visible' || state == 'show') { dom.visibility = 'hidden'; }
		else { dom.visibility = 'visible'; }
		}	
}

function makeVisible(objectID) {
	var dom = findDOM(objectID,1);
	dom.visibility = 'visible';
}

function makeHidden(objectID) {
	var dom = findDOM(objectID,1);
	dom.visibility = 'hidden';
}