if (document.images) {
              var beforeoff = new Image();
              beforeoff.src = "graphics/beforeOFF.gif";
              var beforeon = new Image();
              beforeon.src = "graphics/beforeON.gif";
              var homeoff = new Image();
              homeoff.src = "graphics/homeOFF.gif";
              var homeon = new Image();
              homeon.src = "graphics/homeON.gif";
              var photooff = new Image();
              photooff.src = "graphics/photoOFF.gif";
              var photoon = new Image();
              photoon.src = "graphics/photoON.gif";
              var materialsoff = new Image();
              materialsoff.src = "graphics/materialsOFF.gif";
              var materialson = new Image();
              materialson.src = "graphics/materialsON.gif";
			  var testimonialsoff = new Image();
			  testimonialsoff.src = "graphics/testimonialsOFF.gif";
			  var testimonialson = new Image();
			  testimonialson.src = "graphics/testimonialsON.gif";
			  var contactoff = new Image();
			  contactoff.src = "graphics/contactOFF.gif";
			  var contacton = new Image();
			  contacton.src = "graphics/contactON.gif";
}
            function act(imgName) {
              if (document.images) 
			 document[imgName].src = eval(imgName + 'on.src')
            }

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