userAgent = window.navigator.userAgent;
browserVers = parseInt(userAgent.charAt(userAgent.indexOf("/")+1),10);

function findElement(n,ly) {
	var 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 newImg(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImgArray(array) {
	if (preloadFlag == true) {
		var d = document; var img;
		for (i=0;i<array.length;i+=2) {
			img = null; var n = array[i];
			if (d.images) {
				if (d.layers) {img = findElement(n,0);}
				else {img = d.images[n];}
			}
			if (!img && d.getElementById) {img = d.getElementById(n);}
			if (!img && d.getElementsByName) {
				var elms = d.getElementsByName(n);
				if (elms) {
					for (j=0;j<elms.length;j++) {
						if (elms[j].src) {img = elms[j]; break;}
					}
				}
			}
			if (img) {img.src = array[i+1];}
		}
	}
}

function changeImg() {
	changeImgArray(changeImg.arguments);
}

var preloadFlag = false;
function preloadImg() {
	if (document.images) {
		Lange_06_over 	= newImg('/graphics_slices/Lange_06-over.jpg');
		Lange_06_sticky = newImg('/graphics_slices/Lange_06-sticky.jpg');
		Lange_07_over 	= newImg('/graphics_slices/Lange_07-over.jpg');
		Lange_07_sticky = newImg('/graphics_slices/Lange_07-sticky.jpg');
		Lange_08_over 	= newImg('/graphics_slices/Lange_08-over.jpg');
		Lange_08_sticky = newImg('/graphics_slices/Lange_08-sticky.jpg');
		
		if (sticky[0] == "true"){
		home_sticky 	= '/graphics_slices/Lange_06-sticky.jpg';
		home_over 		= '/graphics_slices/Lange_06-sticky.jpg';
		document.getElementById('submenu1').style.visibility = 'hidden';
		}
		else {
		home_sticky 	= '/graphics_slices/Lange_06.jpg';
		home_over		= '/graphics_slices/Lange_06-over.jpg';
		};
		
		if (sticky[1] == "true"){
		service_sticky 	= '/graphics_slices/Lange_07-sticky.jpg';
		service_over	= '/graphics_slices/Lange_07-sticky.jpg';
		document.getElementById('submenu1').style.visibility = 'visible';
		}
		else if (sticky[3] == "true"){
		service_sticky 	= '/graphics_slices/Lange_07-sticky.jpg';
		service_over	= '/graphics_slices/Lange_07-sticky.jpg';
		document.getElementById('submenu1').style.visibility = 'hidden';
		}
		else {
		service_sticky 	= '/graphics_slices/Lange_07.jpg';
		service_over 	= '/graphics_slices/Lange_07-over.jpg';
		document.getElementById('submenu1').style.visibility = 'hidden';
		};
		
		if (sticky[2] == "true"){
		contact_sticky 	= '/graphics_slices/Lange_08-sticky.jpg';
		contact_over 	= '/graphics_slices/Lange_08-sticky.jpg';
		document.getElementById('submenu1').style.visibility = 'hidden';
		}
		else {
		contact_sticky 	= '/graphics_slices/Lange_08.jpg';
		contact_over 	= '/graphics_slices/Lange_08-over.jpg';
		};
		
		preloadFlag = true;
		setTabs();
	}
}

function setTabs() {if (preloadFlag == true){
		changeImg('Lange_06', home_sticky);
		changeImg('Lange_07', service_sticky);
		changeImg('Lange_08', contact_sticky);
}}