function errorsuppressor(){
return true;
}
window.onerror=errorsuppressor




//rollover
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) {
		//text menue
		men_home_over = newImage("../images/menue/men_home_over.gif");
		men_un_over = newImage("../images/menue/men_un_over.gif");
		men_lstg_over = newImage("../images/menue/men_lstg_over.gif");
		men_proj_over = newImage("../images/menue/men_proj_over.gif");
		men_kontakt_over = newImage("../images/menue/men_kontakt_over.gif");
		
		//banner
		banhome = newImage("../images/banner/banhome.jpg");
		banuntern = newImage("../images/banner/banuntern.jpg");
		banlstg = newImage("../images/banner/banlstg.jpg");
		banprojekte = newImage("../images/banner/banprojekte.jpg");
		bankontakt = newImage("../images/banner/bankontakt.jpg");
	
		//mitte hintergund
		h_untern=newImage("images/mitte/ba_philo.jpg");	
		h_lstg=newImage("images/mitte/ba_lstg.jpg");	
		h_projekte=newImage("images/mitte/ba_projekte.jpg");	
		h_kontakt=newImage("images/mitte/ba_kontakt.jpg");	
		
		//mitte images
		chronik=newImage("images/mitte/bild.jpg");	
		philo=newImage("images/mitte/rose.jpg");
		zahlen=newImage("images/mitte/mitarb.jpg");
		gala=new Image("images/mitte/gala_klinker.jpg");
		dachgr=newImage("images/mitte/dachgr.jpg");
		grbaum=newImage("images/mitte/grossbaum.jpg");
		gestalt=newImage("images/mitte/garten.jpg");	

		//mail
		mail_over = newImage("../images/logo/mail.gif");
		preloadFlag = true;
	}
}

//navigations-quadrat

var active=-1;
var activeImage=new Image();
activeImage.src="../images/menue/quadrat.gif";

var inactiveImage=new Image();
inactiveImage.src="../images/px.gif";

function activate(menuepunkt)
{

if(active!=-1)
	{
	self.document.images[active].src=inactiveImage.src;
	}
	active=menuepunkt;
	self.document.images[active].src=activeImage.src;
}

// bannerwechsel im Menue
function bannerwechsel(url) {
	parent.frames[5].location.href=url
	}




//mitte_mail kontakt e-mail	
function eingabe_pruefen()
{
if(document.mailform.Ansprechpartner.value=="")
	{
	alert("Bitte geben Sie Ihren Namen an!");
	document.mailform.Ansprechpartner.focus();
	return false;
	}
	
	else if(document.mailform.email.value==""||document.mailform.email.value.indexOf("@")==-1)
	{
	alert("Die e-mail Adresse ist unvollstaendig. Bitte korrigieren Sie Ihre Eingabe!");
	document.mailform.email.focus();
	return false;
	}	
	
else
	{
	parent.frames[2].location.href="mitte_mail_ok.htm";
	return true;
	}		
}	

// Textscroll 

var timer_id;
function scroll_iframe(frm,inc,dir) {
  if (timer_id) clearTimeout(timer_id);
  if (window.frames[frm]) {
    if (dir == "v") window.frames[frm].scrollBy(0, inc);
    else window.frames[frm].scrollBy(inc, 0);
    timer_id = setTimeout("scroll_iframe('" + frm + "'," + inc + ",'" + dir + "')", 20);
  }
}

function stopScroll() { if (timer_id) clearTimeout(timer_id); }