var active_subcontent=0;
var active_staysubcontent=0;
var rollover=0;
if (document.images)
	rollover=1;
else
	rollover=0;

if (rollover)
{



		b_1_0 = new Image();
		b_1_1 = new Image();
		b_2_0 = new Image();
		b_2_1 = new Image();
		b_3_0 = new Image();
		b_3_1 = new Image();
	    	b_4_0 = new Image();
		b_4_1 = new Image();
		b_5_0 = new Image();
		b_5_1 = new Image();
		b_6_0 = new Image();
		b_6_1 = new Image();
		b_7_0 = new Image();
		b_7_1 = new Image();		
	    	



		b_1_0.src = "images/strich_weiss.gif";
		b_1_1.src = "images/strich_gruen.gif";
		b_2_0.src = "images/strich_weiss.gif";
		b_2_1.src = "images/strich_gruen.gif";
		b_3_0.src = "images/strich_weiss.gif";
		b_3_1.src = "images/strich_gruen.gif";
	    	b_4_0.src = "images/strich_weiss.gif";
		b_4_1.src = "images/strich_gruen.gif";
		b_5_0.src = "images/strich_weiss.gif";
		b_5_1.src = "images/strich_gruen.gif";
		b_6_0.src = "images/strich_weiss.gif";
		b_6_1.src = "images/strich_gruen.gif";
		b_7_0.src = "images/strich_weiss.gif";
		b_7_1.src = "images/strich_gruen.gif";		
	    									


}



function activate_submenue(submenue) {
	if ((submenue!=active_subcontent) && (submenue!=active_staysubcontent))
		document.images["nav"+submenue].src = eval("b_"+submenue+"_1.src");

}

function deactivate_submenue(submenue) {
	if ((submenue!=active_subcontent) && (submenue!=active_staysubcontent))
		document.images["nav"+submenue].src = eval("b_"+submenue+"_0.src");
}


function store_staymenue(staymenue) {
	if (staymenue!=active_subcontent) {
		if (active_staysubcontent)
			document.images["b"+active_staysubcontent].src = eval("b_"+active_staysubcontent+"_0.src");
		document.images["b"+staymenue].src = eval("b_"+staymenue+"_1.src");
		active_staysubcontent=staymenue;
		}
}

/* stylesheet abfrage, ob es sich um einen mac handelt, dann einlesen von mac-stylesheet */
Mac = (navigator.appVersion.indexOf("Mac") != -1)? true:false;
if(Mac==true){
	document.write("<link href=\"css/style_mac.css\" rel=\"stylesheet\" type=\"text/css\">");
}