var btwuer_off = new Image(); btwuer_off.src = "images/btwuer_off.gif"; var btwuer_on = new Image(); btwuer_on.src = "images/btwuer_on.gif";
var blwuer_off = new Image(); blwuer_off.src = "images/blwuer_off.gif"; var blwuer_on = new Image(); blwuer_on.src = "images/blwuer_on.gif";
var logo_off = new Image(); logo_off.src = "images/logo1.gif"; var logo_on = new Image(); logo_on.src = "images/logo2.gif";
var aktLayer = "#";
var numLayer = 0;

function wuerOn(navNum) {
imgName = "nav" + navNum;
document[imgName].src = eval("btwuer_on.src");
}

function wuerOf(navNum) {
imgName = "nav" + navNum;
document[imgName].src = eval("btwuer_off.src");
}

function wuerliOn(navNum) {
imgName = "nav" + navNum;
document[imgName].src = eval("blwuer_on.src");
}
function wuerliOf(navNum) {
imgName = "nav" + navNum;
document[imgName].src = eval("blwuer_off.src");
}

function logoOn(navNum) {
imgName = "nav" + navNum;
document[imgName].src = eval("logo_on.src");
}

function logoOf(navNum) {
imgName = "nav" + navNum;
document[imgName].src = eval("logo_off.src");
}

function merkeLayer(divname,nr)
{
	aktLayer = divname;
	numLayer = nr;
}

function showHideLayers(lShow, lHide)
{
	if(lShow.search(aktLayer) != -1 && lHide.search("##") != -1)
		return;
	if (document.layers) //ns
	{
		for (i=0; i<(document.layers.length); i++)
		{
			if (document.layers[i].name.search(lHide) != -1)
			{
				document.layers[i].visibility = 'hide';
			}
 			else if (lHide.search("##") != -1 && aktLayer.search("#") == -1)
			{
				document.layers[numLayer].visibility = 'hide';
			}
  			if (document.layers[i].name.search(lShow) != -1)
			{
				document.layers[i].visibility = 'show';
		
			}
		}
	}
	if (document.all != null) //ie
	{
		div = document.all.tags("DIV");
		for (i=0; i<(div.length); i++)
		{
			if (div[i])
			{
				divname = div[i].id;
			}
			else
			{
				divname = '';
			}
			if (divname.search(lHide) != -1)
			{
				document.all[divname].style.visibility = 'hidden';
			}
			else if (lHide.search("##") != -1 && aktLayer.search("#") == -1)
			{
				document.all[aktLayer].style.visibility = 'hidden';
			}
			if (divname.search(lShow) != -1)
			{
				document.all[divname].style.visibility = 'visible';
			}
		}
	}
}