if (document.images) {
                  
            imgulon = new Image();
            imgulon.src = "jerulon.jpg";
            imguron = new Image();
            imguron.src = "jeruron.jpg";
            imgllon = new Image();
            imgllon.src = "jerllon.jpg";
            imglron = new Image();
            imglron.src = "jerlron.jpg";
            
                
            imguloff = new Image(); 
            imguloff.src = "jerul.jpg"; 
            imguroff = new Image(); 
            imguroff.src = "jerur.jpg"; 
            imglloff = new Image(); 
            imglloff.src = "jerll.jpg"; 
            imglroff = new Image(); 
            imglroff.src = "jerlr.jpg"; 


            imgulad = new Image();
            imgulad.src = "serv6.jpg";
            imgurad = new Image();
            imgurad.src = "usnewsm.jpg";
            imgllad = new Image();
            imgllad.src = "clientsm.jpg";
            imglrad = new Image();
            imglrad.src = "tech2.gif";

         }


function imgOn(imgName) {
        if (document.images) {
            document[imgName].src = eval(imgName + "on.src");
            document["common"].src = eval(imgName + "ad.src");
        }
	}


function imgOff(imgName) {
        if (document.images) {
            document[imgName].src = eval(imgName + "off.src");
            document["common"].src = "common.jpg";
        }
}