NAVarr = new Array("aboutus", "ourservices", "portfolio", "contactus");
if (document.images) {
	for (var NAVitem in NAVarr) { 
		 for (var NAVicount=0; NAVicount < 2; NAVicount++) { 
				eval("b" + NAVarr[NAVitem] + NAVicount + " = new Image()");
				eval("b" + NAVarr[NAVitem] + NAVicount + ".src = 'assets/nav-" + NAVarr[NAVitem] + "-" + NAVicount + ".gif'");
		 } 
	} 
}

function BturnOn(imageName) {
	if (document.images) {
		var imageNumber = "";
		if (arguments.length > 1) imageNumber = arguments[1];
		document [imageName + imageNumber].src = eval("b" + imageName + "1.src");
	}
}

function BturnOff(imageName) {
	if (document.images) {
		var imageNumber = "";
		if (arguments.length > 1) imageNumber = arguments[1];
		document [imageName + imageNumber].src = eval("b" + imageName + "0.src");
	}
}

function toggleDiv(divName) {
		thisDiv = document.getElementById(divName);
		if (thisDiv) {
			if (thisDiv.style.display == "none") {
				thisDiv.style.display = "block";
			}
			else {
				thisDiv.style.display = "none";
			}
		}
		else {
			alert("Error: Could not locate div with id: " + divName);
		}
	}