if (document.images) {

  image1on = new Image();
  image1on.src = "images/nav/home-on.gif";
  
  image2on = new Image();
  image2on.src = "images/nav/search-on.gif";

  image3on = new Image();
  image3on.src = "images/nav/featured-on.gif";

  image4on = new Image();
  image4on.src = "images/nav/lifestyle-on.gif";

  image5on = new Image();
  image5on.src = "images/nav/one-on.gif";

  image6on = new Image();
  image6on.src = "images/nav/about-on.gif";

  image7on = new Image();
  image7on.src = "images/nav/contact-on.gif";

  image1off = new Image();
  image1off.src = "images/nav/home-off.gif";
  
  image2off = new Image();
  image2off.src = "images/nav/search-off.gif";
  
  image3off = new Image();
  image3off.src = "images/nav/featured-off.gif";
  
  image4off = new Image();
  image4off.src = "images/nav/lifestyle-off.gif";
  
  image5off = new Image();
  image5off.src = "images/nav/one-off.gif";
  
  image6off = new Image();
  image6off.src = "images/nav/about-off.gif";
  
  image7off = new Image();
  image7off.src = "images/nav/contact-off.gif";
  
  
  
	//introduce rollover images for buttons: prev, next, emailus, vt, more details, email me, link to my website
	var preva = new Image();
	preva.src = "images/prev-a.gif";
	var prevb = new Image();
	prevb.src = "images/prev-b.gif";
	
	var nexta = new Image();
	nexta.src = "images/next-a.gif";
	var nextb = new Image();
	nextb.src = "images/next-b.gif";
	
	var showcasea = new Image();
	showcasea.src = "images/showcase-a.gif";
	var showcaseb = new Image();
	showcaseb.src = "images/showcase-b.gif";
	
	var emaila = new Image();
	emaila.src = "images/email-a.gif";
	var emailb = new Image();
	emailb.src = "images/email-b.gif";
	
	var moreinfoa = new Image();
	moreinfoa.src = "images/moreinfo-a.gif";
	var moreinfob = new Image();
	moreinfob.src = "images/moreinfo-b.gif";
	
	var moredetailsa = new Image();
	moredetailsa.src = "images/moredetails-a.gif";
	var moredetailsb = new Image();
	moredetailsb.src = "images/moredetails-b.gif";
	
	var emailmea = new Image();
	emailmea.src = "images/emailme-a.gif";
	var emailmeb = new Image();
	emailmeb.src = "images/emailme-b.gif";
	
	var linka = new Image();
	linka.src = "images/link-a.gif";
	var linkb = new Image();
	linkb.src = "images/link-b.gif";
	  
  
}
function turnOn(imageName) {
  if (document.images) {
    document[imageName].src = eval(imageName + "on.src");
  }
}

function turnOff(imageName) {
  if (document.images) {
    document[imageName].src = eval(imageName + "off.src");
  }
}

//open window for property photos
function openWin(URL) {
aWindow = window.open(URL,"Window","scrollbars=yes,resizable=yes,width=700,height=600");
}