//browsererkennung
var isMinNS4 = (navigator.appName.indexOf("Netscape") >= 0 && parseFloat(navigator.appVersion) >= 4&&parseFloat(navigator.appVersion) < 5) ? 1 : 0;
var isMinNS6 = (isMinNS4 && navigator.userAgent.indexOf("Gecko")>=0) ? 1 : 0;
var isMinIE4 = (document.all) ? 1 : 0;
var isMinIE5 = (isMinIE4 && navigator.appVersion.indexOf("5.")) >= 0 ? 1 : 0;
var isDOM = (document.getElementById) ? 1 : 0;

// preloading main navigation-images
if (document.images) { 
img1on=new Image();
img1on.src="images/nav/ueberuns_hi.gif";
img2on=new Image();
img2on.src="images/nav/aktuelles_hi.gif";
img3on=new Image();
img3on.src="images/nav/MDgruppen_hi.gif";
img4on=new Image();
img4on.src="images/nav/MDbuch_hi.gif";
img5on=new Image();
img5on.src="images/nav/MDclub_hi.gif";
img6on=new Image();
img6on.src="images/nav/uebergewicht_hi.gif";
img7on=new Image();
img7on.src="images/nav/anmeldung_hi.gif";
img8on=new Image();
img8on.src="images/nav/kontakt_hi.gif";
img9on=new Image();
img9on.src="images/nav/download_hi.gif";
img10on=new Image();
img10on.src="images/nav/jobs_hi.gif";

img1off=new Image();
img1off.src="images/nav/ueberuns_lo.gif";
img2off=new Image();
img2off.src="images/nav/aktuelles_lo.gif";
img3off=new Image();
img3off.src="images/nav/MDgruppen_lo.gif";
img4off=new Image();
img4off.src="images/nav/MDbuch_lo.gif";
img5off=new Image();
img5off.src="images/nav/MDclub_lo.gif";
img6off=new Image();
img6off.src="images/nav/uebergewicht_lo.gif";
img7off=new Image();
img7off.src="images/nav/anmeldung_lo.gif";
img8off=new Image();
img8off.src="images/nav/kontakt_lo.gif";
img9off=new Image();
img9off.src="images/nav/download_lo.gif";
img10off=new Image();
img10off.src="images/nav/jobs_lo.gif";

// subnavigation - ueber uns
s2img1on=new Image();
s2img1on.src="images/nav/subnav_ziele_hi.gif";
s2img2on=new Image();
s2img2on.src="images/nav/subnav_programm_hi.gif";
s2img3on=new Image();
s2img3on.src="images/nav/subnav_team_hi.gif";
s2img4on=new Image();
s2img4on.src="images/nav/subnav_kosten_hi.gif";
s2img5on=new Image();
s2img5on.src="images/nav/subnav_ergebnisse_hi.gif";

s2img1off=new Image();
s2img1off.src="images/nav/subnav_ziele_lo.gif";
s2img2off=new Image();
s2img2off.src="images/nav/subnav_programm_lo.gif";
s2img3off=new Image();
s2img3off.src="images/nav/subnav_team_lo.gif";
s2img4off=new Image();
s2img4off.src="images/nav/subnav_kosten_lo.gif";
s2img5off=new Image();
s2img5off.src="images/nav/subnav_ergebnisse_lo.gif";

//subnavigation - moby dick gruppen
s3img1on=new Image();
s3img1on.src="images/nav/subnav_hamburg_hi.gif";
s3img2on=new Image();
s3img2on.src="images/nav/subnav_netzwerkpartner_hi.gif";

s3img1off=new Image();
s3img1off.src="images/nav/subnav_hamburg_lo.gif";
s3img2off=new Image();
s3img2off.src="images/nav/subnav_netzwerkpartner_lo.gif";

}

// function to activate images
function imgOn(imgName) {
	if (isDOM) {
	//alert('dom');
	document.getElementById(imgName).src = eval(imgName+"on.src");
	} else {
	//alert('nodom');
	document[imgName].src=eval(imgName+"on.src");
	}
}

// function to deactivate images
function imgOff(imgName) {
	if (isDOM) {
	document.getElementById(imgName).src = eval(imgName+"off.src");
	} else {
	document[imgName].src=eval(imgName+"off.src");
	}
}

// from here: not used yet

//macht entsprechende container sicht- oder unsichtbar
function zeigeEbene (id) {
  if (isMinIE4) document.all[id].style.visibility = "visible" ; 
  if (isMinIE4||isDOM) document.getElementById(id).style.visibility = "visible";
  if (isMinNS4) document.layers[id].visibility = "show";
}

function verbergeEbene (id) {
  if (isMinIE4) document.all[id].style.visibility = "hidden";  
  if (isMinIE4||isDOM) document.getElementById(id).style.visibility = "hidden";
  if (isMinNS4) document.layers[id].visibility = "hide";
}