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/UI/button1_off.gif";
image1on = new Image();
image1on.src = "images/UI/button1_on.gif";
image2= new Image();
image2.src = "images/UI/button2_off.gif";
image2on = new Image();
image2on.src = "images/UI/button2_on.gif";
image3= new Image();
image3.src = "images/UI/button3_off.gif";
image3on = new Image();
image3on.src = "images/UI/button3_on.gif";
image4= new Image();
image4.src = "images/UI/button4_off.gif";
image4on = new Image();
image4on.src = "images/UI/button4_on.gif";
image5= new Image();
image5.src = "images/UI/button5_off.gif";
image5on = new Image();
image5on.src = "images/UI/button5_on.gif";
image6= new Image();
image6.src = "images/UI/button6_off.gif";
image6on = new Image();
image6on.src = "images/UI/button6_on.gif";
image7= new Image();
image7.src = "images/UI/button7_off.gif";
image7on = new Image();
image7on.src = "images/UI/button7_on.gif";
image8= new Image();
image8.src = "images/UI/button8_off.gif";
image8on = new Image();
image8on.src = "images/UI/button8_on.gif";
image9= new Image();
image9.src = "images/UI/button9_off.gif";
image9on = new Image();
image9on.src = "images/UI/button9_on.gif";
image10= new Image();
image10.src = "images/UI/sublink_webgall_off.gif";
image10on = new Image();
image10on.src = "images/UI/sublink_webgall_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); } }