function bookmark() {
  var ver = navigator.appName;
  var num = parseInt(navigator.appVersion);
  var bmurl="http://www.snyderhankinscustomhomes.com";
  var bmtitle="Snyder-Hankins Custom Homes";
  if ((ver == "Microsoft Internet Explorer")&&(num >= 4)) {
    window.external.AddFavorite(bmurl, bmtitle);
  } else if (document.all) {
    window.external.AddFavorite(bmurl, bmtitle);
  } else if (window.sidebar) {
    window.sidebar.addPanel(bmtitle, bmurl, '');
  } else if (navigator.userAgent.indexOf("Opera") != -1) {
    alert("Press Ctrl-T after closing this message to add rvNetLinx to your favorites");
  } else {
    alert("Press Ctrl-D after closing this message to bookmark rvNetLinx");
  }
}


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) {
		menu_but_about_over = newImage("images/menu-but-about-over.jpg");
		menu_but_port_over = newImage("images/menu-but-port-over.jpg");
		menu_but_available_over = newImage("images/menu-but-available-over.jpg");
		menu_but_homesites_over = newImage("images/menu-but-homesites-over.jpg");
		menu_but_comm_over = newImage("images/menu-but-comm-over.jpg");
		menu_but_home_over = newImage("images/menu-but-home-over.jpg");
		menu_but_faq_over = newImage("images/menu-but-faq-over.jpg");
		menu_but_fplns_over = newImage("images/menu-but-fplns-over.jpg");
		menu_but_contact_over = newImage("images/menu-but-contact-over.jpg");
		preloadFlag = true;
	}
}