function bookmark() {
  if (window.external) {
    window.external.AddFavorite(location.href, 'DeGabriel - Most Respected Builder in Raleigh, NC');
  }
  else if (navigator.userAgent.indexOf("Opera") != -1) {
    alert("Press Ctrl-T after closing this message to add DeGabriel to your hotlist");
  }
  else if (navigator.appName == "Netscape") {
  	alert("Press Ctrl-D after closing this message to bookmark DeGabriel");
  }
}

function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

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

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		home_button_over = newImage("images/home-button-over.jpg");
		about_button_over = newImage("images/about-button-over.jpg");
		deprocess_button_over = newImage("images/deprocess-button-over.jpg");
		link_button_over = newImage("images/link-button-over.jpg");
		contact_button_over = newImage("images/contact-button-over.jpg");
		available_button_over = newImage("images/available-button-over.jpg");
		portfolio1_button_over = newImage("images/portfolio1-button-over.jpg");
		portfolio2_button_over = newImage("images/portfolio2-button-over.jpg");
		preloadFlag = true;
	}
}