NS4 = (document.layers);
	IE4 = (document.all);
	ver4 = (NS4 || IE4);
	IE5 = (IE4 && navigator.appVersion.indexOf("5.")!=-1);
	isMac = (navigator.appVersion.indexOf("Mac") != -1);
	isMenu = (NS4 || (IE4 && !isMac) || (IE5 && isMac));
	
	if (!ver4) event = null;
	
	
	
	
	if (document.images) {
	  image1on = new Image();
	  image1on.src = "images/on_homepage.gif";
	
	  image2on = new Image();
	  image2on.src = "images/on_realestate.gif";
	
	  image3on = new Image();
	  image3on.src = "images/on_products.gif";
	
	  image4on = new Image();
	  image4on.src = "images/on_aboutus.gif";
	
	  image5on = new Image();
	  image5on.src = "images/on_contactus.gif";
	
	  image6on = new Image();
	  image6on.src = "images/h_7r.jpg";
	
	  image1off = new Image();
	  image1off.src = "images/homepage.gif";
	
	  image2off = new Image();
	  image2off.src = "images/realestate.gif";
	
	  image3off = new Image();
	  image3off.src = "images/products.gif";
	
	  image4off = new Image();
	  image4off.src = "images/aboutus.gif";
	
	  image5off = new Image();
	  image5off.src = "images/contactus.gif";
	
	  image6off = new Image();
	  image6off.src = "images/h_7.jpg";
	
	}
	
	function changeImages(imageName, imageSource) {
	  document.images[imageName].src = eval(imageSource + ".src")
	}