var browser_name = navigator.appName;
var browser_version = parseFloat(navigator.appVersion); 
var objCount= 0;

if (browser_name == "Netscape" && browser_version > 3.0)
	browserOK = true;
else if (browser_name == "Microsoft Internet Explorer" && browser_version >= 3.0)
	browserOK = true;
else
	browserOK = false;
	
if (browserOK)
	ImageArray= new Array();
	
function preload(name, firstImg, secondImg) {
	if (browserOK) {
		ImageArray[objCount]= new Array(3);
		ImageArray[objCount][0]= new Image();
		ImageArray[objCount][0].src= firstImg;
		ImageArray[objCount][1]= new Image();
		ImageArray[objCount][1].src= secondImg;
		ImageArray[objCount][2]= name;
		objCount++;
	}
}

function on(img){
	if (browserOK)
		for (var i=0;i<objCount;i++)
			if (ImageArray[i][2] == img)
				document.images[i].src = ImageArray[i][1].src;
}

function off(img){
	if (browserOK)
		for (var i=0;i<objCount;i++)
			if (ImageArray[i][2] == img)
				document.images[i].src = ImageArray[i][0].src;
}
preload('head','images/hl2.gif','images/hl1.gif');
preload('home','images/hemoff.gif','images/hemon.gif');
preload('mal','images/maloff.gif','images/malon.gif');
preload('info','images/infooff.gif','images/infoon.gif');
//preload('gall','images/galloff.gif','images/gallon.gif');
//preload('gast','images/gastoff.gif','images/gaston.gif');
preload('mail','images/mailoff.gif','images/mailon.gif');
//preload('gbr','images/gboff.gif','images/gbon.gif');

//Kontroller för midi
//if(navigator.userAgent.indexOf("MSIE") != -1){document.writeln('<BGSOUND SRC="sound/rudolph.mid" LOOP="INFINITE" VOLUME="80%" WIDTH=0 HEIGHT=0 HIDDEN>');}
//else{document.writeln('<EMBED SRC="sound/rudolph.mid" AUTOSTART="TRUE" LOOP="TRUE" WIDTH=0 HEIGHT=0 VOLUME="80%" HIDDEN>');}
//if(navigator.userAgent.indexOf("MSIE") != -1){document.writeln('<BGSOUND SRC="sound/tillther.mid" VOLUME="80%" WIDTH=0 HEIGHT=0 HIDDEN>');}
//else{document.writeln('<EMBED SRC="sound/tillther.mid" AUTOSTART="TRUE" WIDTH=0 HEIGHT=0 VOLUME="80%" HIDDEN>');}