Name = navigator.appName;
 Version = parseInt(navigator.appVersion);
 if (Version >= 3)
         Browser = "n3";
 else
         Browser = "n2";
 if (Browser == "n3") {

     email0 = new Image();
     email0.src  = TEMPLATE_DIR+"template-images/masthead-email0.jpg";
     email1 = new Image();
     email1.src = TEMPLATE_DIR+"template-images/masthead-email1.jpg";
}

function change(Name,Image,No) {
     if (Browser == "n3") document [Name].src = eval(Image + No + ".src");
}