<!--  to hide script contents from old browsers

version = "0";
browserName = navigator.appName;

browserVer = parseInt(navigator.appVersion);
if ((browserName == "Netscape" && browserVer >=3) || ((browserName.indexOf( "Microsoft") >= 0) && browserVer >= 4 )) version ="n3";
else version = "n2"

if (version == "n3") 

         {
                       how = new Image;
                       how.src = "images/indextopb_01.gif";
                       howoff = new Image;
                       howoff.src = "images/indextopw_01.gif"
                       howon = new Image;
                       howon.src = "images/indextopb_01.gif";

			     learn = new Image;
                       learn.src = "images/indextopb_02.gif";
                       learnoff = new Image;
                       learnoff.src = "images/indextopw_02.gif"
                       learnon = new Image;
                       learnon.src = "images/indextopb_02.gif";

                       contact = new Image;
                       contact.src = "images/indextopb_03.gif";
                       contactoff = new Image;
                       contactoff.src = "images/indextopw_03.gif"
                       contacton = new Image;
                       contacton.src = "images/indextopb_03.gif";
 

}

function roll_on(imgName) {

if (version == "n3")
{
               imgOn = eval(imgName + "on.src");
               document [imgName].src = imgOn;
}
}
       
function roll_off(imgName) {

if (version == "n3")
{               
               imgOff = eval(imgName + "off.src");
               document [imgName].src = imgOff;
}
}


// end hiding contents from old browsers  -->