userAgent = window.navigator.userAgent;
browserVers = parseInt(userAgent.charAt(userAgent.indexOf("/")+1),10);
mustInitImg = true;
function initImgID() 
{
	di = document.images; 
	if (mustInitImg && di) 
	{ 
		for (var i=0; i<di.length; i++) 
		{ 
			if (!di[i].id) di[i].id=di[i].name; 
		} 
		mustInitImg = false;
	}
}

function findElement(n,ly) 
{
	d = document;
	if (browserVers < 4)		return d[n];
	if ((browserVers >= 6) && (d.getElementById)) 
	{
		initImgID; 
		return(d.getElementById(n))
	}; 
	var cd = ly ? ly.document : d;
	var elem = cd[n];
	if (!elem) 
	{
		for (var i=0;i<cd.layers.length;i++) 
		{
			elem = findElement(n,cd.layers[i]);
			if (elem) return elem;
		}
	}
	return elem;
}

function changeImages() 
{
	d = document;
	if (d.images) 
	{
		var img;
		for (var i=0; i<changeImages.arguments.length; i+=2) 
		{
			img = null;
			if (d.layers) 
			{
				img = findElement(changeImages.arguments[i],0);
			}
			else 
			{
				img = d.images[changeImages.arguments[i]];
			}
			if (img) 
			{
				img.src = changeImages.arguments[i+1];
			}
		}
	}
}
function newImage(arg) 
{
	if (document.images) 
	{
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}
		
function preloadImages_navi() 
{
	if (document.images) 
	{
		over_navi_weiter1 = newImage('http://www.avantel.de/tools/navi_res/navi_weiter.gif');
		over_navi_ueber1 = newImage('http://www.avantel.de/tools/navi_res/navi_ueber.gif');
		over_navi_kontakt1 = newImage('http://www.avantel.de/tools/navi_res/navi_kontakt.gif');
		over_navi_agb1 = newImage('http://www.avantel.de/tools/navi_res/navi_agb.gif');
		over_navi_impr1 = newImage('http://www.avantel.de/tools/navi_res/navi_impr.gif');
		over_navi_suche1 = newImage('http://www.avantel.de/tools/navi_res/navi_suche.gif');
	}
}

var preloadFlag = false;
function preloadImages() 
{
	if (document.images) 
	{
		preloadImages_navi();
		preloadFlag = true;
	}
}