ns4 = (document.layers)? true:false
ie4 = (document.all)? true:false
	
function loadNav1(page,verz) {
		if (ns4) {
				document.navLayer1.visibility = "show";
				document.navLayer2.visibility = "hide";
				document.contentLayer.src = page;
				}
		else if (ie4) {
				parent.contentFrame.document.location = page;
				parent.navigationFrame.document.location = verz;
				}
}

function loadNav2(page,verz) {
		if (ns4) {
				document.navLayer1.visibility = "hide";
				document.navLayer2.visibility = "show";
				document.contentLayer.src = page;
				}
		else if (ie4) {
				parent.contentFrame.document.location = page;
				parent.navigationFrame.document.location = verz;
				}
}

function rollOver (imgname) {
	document.images[imgname].src = "../images/glas_pic.gif";
}
function rollOut (imgname) {
	document.images[imgname].src = "../images/rot_pic.gif";
}