if (navigator.appVersion.indexOf("2.") != -1) {check = false;}
if ((navigator.appVersion.indexOf("3.") != -1) && (navigator.appName.indexOf("Explorer") != -1)) {check = false;  } else {check = true;}

image1= new Image();
image1.src = "../images/home_off.gif";
image1on = new Image();
image1on.src = "../images/home_on.gif";
image2= new Image();
image2.src = "../images/about_off.gif";
image2on = new Image();
image2on.src = "../images/about_on.gif";
image3= new Image();
image3.src = "../images/contact_off.gif";
image3on = new Image();
image3on.src = "../images/contact_on.gif";
image4= new Image();
image4.src = "../images/services_off.gif";
image4on = new Image();
image4on.src = "../images/services_on.gif";
image5= new Image();
image5.src = "../images/resource_off.gif";
image5on = new Image();
image5on.src = "../images/resource_on.gif";
image6= new Image();
image6.src = "../images/request_off.gif";
image6on = new Image();
image6on.src = "../images/request_on.gif";
image7= new Image();
image7.src = "../images/sitemap_off.gif";
image7on = new Image();
image7on.src = "../images/sitemap_on.gif";

function imageon(name)   {document[name].src = eval(name + "on.src"); }
function imageoff(name)  {document[name].src = eval(name + ".src"); }
function on(name)  {if (check == true){imageon(name); } }
function off(name)  {if (check == true){imageoff(name); } }