var preloadFlag = false;
			function preloadImages() {
				if (document.images) {
					pre_profil_02 = newImage('../Bilder/buttons/profil_02.gif');
					pre_angebot_02 = newImage('../Bilder/buttons/angebot_02.gif');
					pre_referenzen_02 = newImage('../Bilder/buttons/referenzen_02.gif');
					pre_netzwerk_02 = newImage('../Bilder/buttons/netzwerk_02.gif');
					pre_kontakt_02 = newImage('../Bilder/buttons/kontakt_02.gif');
					preloadFlag = true;
				}
			}
			function changeImagesArray(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 changeImages() {
				changeImagesArray(changeImages.arguments);
			}
			function toggleImages() {
				for (var i=0; i<toggleImages.arguments.length; i+=2) {
					if (selected == toggleImages.arguments[i])
						changeImagesArray(toggleImages.arguments[i+1]);
				}
			}			
			function newImage(arg) {
				if (document.images) {
					rslt = new Image();
					rslt.src = arg;
					return rslt;
				}
			}
			userAgent = window.navigator.userAgent;
			browserVers = parseInt(userAgent.charAt(userAgent.indexOf("/")+1),10);
			mustInitImg = true;
			function initImgID() {var 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) {
				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;
			}