// Richtiger Browser?
var browsername = navigator.appName; 
var browserversion = parseInt(navigator.appVersion);
var browserVersionNum = parseFloat(navigator.appVersion)
var agt=navigator.userAgent.toLowerCase();

var is_netscape=(browsername.indexOf("Netscape")!=-1);
var is_ie=(browsername.indexOf("Microsoft Internet Explorer")!=-1);
var isMac  = (agt.indexOf("mac")!=-1);


var isW3C=false; // Gibt an, ob es NS6 oder anderer W3C kompatibler Browser ist
if ((document.getElementById) && is_netscape) {isW3C=true;}


// Detect Internet Explorer Versionsnummer:
var ua = window.navigator.userAgent
var msie = ua.indexOf ( "MSIE " )
var verIE= parseInt (ua.substring (msie+5, ua.indexOf (".", msie )));
      
// Festlegen, ob Layer verwendet werden koennen:
var useLayer=false;
if ( ((document.layers) || (document.all) || ( isW3C) ) && !((verIE<5) && isMac) ) {
	useLayer=true;
}			

var br = "";
if ( (is_netscape && browserversion >= 3) ||
     (browsername == "Microsoft Internet Explorer" && browserversion >= 4)) {  

br = "n3";

// Passiven Bilder vordefinieren:

home_on = new Image();	home_on.src = "/Icons/nav_home_on.gif";
info_on = new Image();	info_on.src = "/Icons/nav_info_on.gif";
bio_on = new Image();	bio_on.src = "/Icons/nav_bio_on.gif";
disko_on = new Image();	disko_on.src = "/Icons/nav_disko_on.gif";
media_on = new Image();	media_on.src = "/Icons/nav_media_on.gif";

// sub1_on = new Image();	sub1_on.src = "/Icons/subnav1.gif";
// sub2_on = new Image();	sub2_on.src = "/Icons/subnav2.gif";
// sub3_on = new Image();	sub3_on.src = "/Icons/subnav3.gif";
// sub4_on = new Image();	sub4_on.src = "/Icons/subnav4.gif";
// sub5_on = new Image();	sub5_on.src = "/Icons/subnav5.gif";
// sub6_on = new Image();	sub6_on.src = "/Icons/subnav6.gif";
// sub7_on = new Image();	sub7_on.src = "/Icons/subnav7.gif";

}

var save_src="";

function toggle_image (bild,mode) {
	// Tauscht "bild" gegen die *_on" Variante aus:
	if ( br == "n3" ) {
		if (mode == "off") {
     		document.images[bild].src =save_src;
		} else {
			save_src=document.images[bild].src;
			document.images[bild].src = eval ( bild + "_on.src" );
		}
   	}
}


function initializePage() {
	if (main_nav!="blank") {
		document.images[main_nav].src = eval ( main_nav + "_on.src" );
		// toggle_image(main_nav,"on");
	}
	if (sub_nav!="blank") {
		document.images[sub_nav].src = eval ( sub_nav + "_on.src" );
		// toggle_image(sub_nav,"on");
	}

}


// ================= Oeffnet neues Fenster: ===========

function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}