userAgent = window.navigator.userAgent;
browserVers = parseInt(userAgent.charAt(userAgent.indexOf("/")+1),10);
function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function findElement(n,ly) {
	if (browserVers < 4)		return document[n];
	var curDoc = ly ? ly.document : document;
	var elem = curDoc[n];
	if (!elem) {
		for (var i=0;i<curDoc.layers.length;i++) {
			elem = findElement(n,curDoc.layers[i]);
			if (elem) return elem;
		}
	}
	return elem;
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		var img;
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			img = null;
			if (document.layers) {
				img = findElement(changeImages.arguments[i],0);
			}
			else {
				img = document.images[changeImages.arguments[i]];
			}
			if (img) {
				img.src = changeImages.arguments[i+1];
			}
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		depts_o = newImage("images/depts-o.jpg");
		el_o = newImage("images/el-o.jpg");
		quality_o = newImage("images/quality-o.jpg");
		contacts_o = newImage("images/contacts-o.jpg");
		info_o = newImage("images/info-o.jpg");
		shopm_o = newImage("images/shopm-o.gif");
		design_o = newImage("images/design-o.gif");
		cncm_o = newImage("images/cncm-o.gif");
		cnct_o = newImage("images/cnct-o.gif");
		manm_o = newImage("images/manm-o.gif");
		cncsedm_o = newImage("images/cncsedm-o.gif");
		wireedm_o = newImage("images/wireedm-o.gif");
		srfgrd_o = newImage("images/srfgrd-o.gif");
		visgrd_o = newImage("images/visgrd-o.gif");
		idod_o = newImage("images/idod-o.gif");
		jig_o = newImage("images/jig-o.gif");
		engrave_o = newImage("images/engrave-o.gif");
		polish_o = newImage("images/polish-o.gif");
		inspt_o = newImage("images/inspt-o.gif");
		preloadFlag = true;
	}
}