if (document.images) {

// mouse-over images
	  var homeon = new Image();
	 homeon.src = "/media/home_1.png";

	  var homeoff = new Image();
	  homeoff.src = "/media/home.png";

	  var videoon = new Image();
	 videoon.src = "/media/video_1.png";

	  var videooff = new Image();
	  videooff.src = "/media/video.png";

	  var photoson = new Image();
	 photoson.src = "/media/photos_1.png";

	  var photosoff = new Image();
	  photosoff.src = "/media/photos.png";

	  var specson = new Image();
	 specson.src = "/media/specs_1.png";

	  var specsoff = new Image();
	  specsoff.src = "/media/specs.png";

	  var contacton = new Image();
	 contacton.src = "/media/contact_1.png";

	  var contactoff = new Image();
	  contactoff.src = "/media/contact.png";

}	  
	  

function swapImgOn(imgName) {
	if (document.images) {	 
	 document[imgName].src= eval(imgName+'on'+'.src');
	}
}	


function swapImgOff(imgName) {
	if (document.images) {
		document[imgName].src= eval(imgName+'off'+'.src');
	}
}