if (document.images) {
  		homeOn = new Image();
  		homeOn.src = "images/home1.jpg";
  		flightOn = new Image();
  		flightOn.src = "images/about2.jpg";
  		passengerOn = new Image();
  		passengerOn.src = "images/features1.jpg";
		airportOn = new Image();
  		airportOn.src = "images/proram1.jpg";
  		bidsOn = new Image();
  		bidsOn.src = "images/contact1.jpg";
		
  		travelOn = new Image();
  		travelOn.src = "images/learn1.jpg";
  		corporationOn = new Image();
  		corporationOn.src = "images/corporation_a.jpg";
		
  		homeOff = new Image();
  		homeOff.src = "images/home.jpg";
  		flightOff = new Image();
  		flightOff.src = "images/about.jpg";
 		passengerOff = new Image();
  		passengerOff.src = "images/features.jpg";
		airportOff = new Image();
  		airportOff.src = "images/proram.jpg";
  		bidsOff = new Image();
  		bidsOff.src = "images/contact.jpg";
		
  		travelOff = new Image();
  		travelOff.src = "images/learn.jpg";
  		corporationOff = new Image();
  		corporationOff.src = "images/corporation.jpg";
		
  	}

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