var browser  = navigator.userAgent.substring(0,7);
var version  = parseInt(navigator.userAgent.substring(8,9)); 

if ((browser == "Mozilla") && (version >= 3)) {
   KnapOn = new makeArray(14);
   KnapOff = new makeArray(14);

   var size = 0;
   if (version == 3) {var size = 1 };  
   if ((navigator.userAgent.substring(25,29) == "MSIE")&&(navigator.userAgent.substring(36,39)=="Mac")) {var size = 0 };

   KnapOn[1].src = "images/info2.gif";
   KnapOn[2].src = "images/prod2.gif";
   KnapOn[3].src = "images/instal2.gif";
   KnapOn[4].src = "images/mainte2.gif";
   KnapOn[5].src = "images/conv2.gif";
   KnapOn[6].src = "images/pric2.gif";
   KnapOn[7].src = "images/deal2.gif";
   KnapOn[8].src = "images/news2.gif";
   KnapOn[9].src = "images/refer2.gif";
   KnapOn[10].src = "images/downloads2.gif";
   KnapOn[11].src = "images/examples2.gif";
   KnapOn[12].src = "images/jobs2.gif";
   KnapOn[13].src = "images/main2.gif";
   KnapOn[14].src = "images/st-site2.gif";

   KnapOff[1].src = "images/info1.gif";
   KnapOff[2].src = "images/prod1.gif";
   KnapOff[3].src = "images/instal1.gif";
   KnapOff[4].src = "images/mainte1.gif";
   KnapOff[5].src = "images/conv1.gif";
   KnapOff[6].src = "images/pric1.gif";
   KnapOff[7].src = "images/deal1.gif";
   KnapOff[8].src = "images/news1.gif";
   KnapOff[9].src = "images/refer1.gif";
   KnapOff[10].src = "images/downloads1.gif";
   KnapOff[11].src = "images/examples1.gif";
   KnapOff[12].src = "images/jobs1.gif";   
   KnapOff[13].src = "images/main1.gif";
   KnapOff[14].src = "images/st-site1.gif";
}
                
function makeArray(n)
{
 this.length = n;
 for (var i = 1; i<=n; i++) {this[i] = new Image();}
 return this
}

function onImage(num)
{
 if ((browser == "Mozilla") && (version >= 3))
  {
   document.images[num+size-1].src = KnapOn[num].src;
  }
}

function offImage(num)
{
 if ((browser == "Mozilla") && (version >= 3))
   {document.images[num+size-1].src = KnapOff[num].src;
   }
}