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) {
	nav_testimonials_m			= newImage("/images/cust-comments-ON.gif");
	nav_about_m 				= newImage("/images/about-ON.gif");
	nav_specials_m 				= newImage("/images/specials-ON.gif");
	nav_faq_m 					= newImage("/images/faq-ON.gif");
	nav_contact_m 				= newImage("/images/contact-ON.gif");
	nav_guarantee_m 			= newImage("/images/guarantee-ON.gif");

	btn_home_m					= newImage("/images/nav_home-over.gif");
	btn_carpet_cleaning_m 		= newImage("/images/nav_carpet-over.gif");
	btn_upholstery_cleaning_m 	= newImage("/images/nav_upholstery-over.gif");
	btn_leather_cleaning_m 		= newImage("/images/nav_leather-over.gif");
	btn_air_duct_cleaning_m 	= newImage("/images/nav_air-duct-over.gif");
	btn_water_extraction_m 		= newImage("/images/nav_water-extraction-over.gif");
	btn_oriental_rug_cleaning_m = newImage("/images/nav_oriental-rug-over.gif");
	btn_pet_odor_treatment_m	= newImage("/images/nav_pet-odor-over.gif");
	btn_drapery_cleaning_m 		= newImage("/images/nav_drapery-over.gif");
	btn_smoke_fire_restoration_m= newImage("/images/nav_smoke-fire-over.gif");
	btn_construction_m 			= newImage("/images/nav_construction-over.gif");
	btn_ceramic_tile_m 			= newImage("/images/nav_stone-tile-over.gif");
	btn_marble_polish_m			= newImage("/images/nav_marble-over.gif");

	btn_sign_up_m 				= newImage("/images/sign-up-bttn-ON.gif");
	btn_view_specials_m			= newImage("/images/view-our-specials-ON.gif");

    preloadFlag = true;
  }
}