version = parseInt(navigator.appVersion);

function imgStore(onImg, offImg) {
   if (version >= 3) {
       this.on = new Image();
       this.on.src = onImg;
       this.off = new Image();
       this.off.src = offImg;
   }
}
function roll_on(name) {
    if (version >= 3) {
        document[name].src = store[name].on.src;
    }
}
function roll_out(name) {               
    if (version >= 3) {
        document[name].src = store[name].off.src;
    }
}
if (version >= 3) {
   var store = new Object();

//-- Top Nav Rollovers --
   store.about = new imgStore('graphics/nav/mabouton.gif', 'graphics/nav/maboutoff.gif');
   store.products = new imgStore('graphics/nav/mproductson.gif', 'graphics/nav/mproductsoff.gif');
   store.iso = new imgStore('graphics/nav/misoon.gif', 'graphics/nav/misooff.gif');
   store.register = new imgStore('graphics/nav/mregisteron.gif', 'graphics/nav/mregisteroff.gif');
   store.contact = new imgStore('graphics/nav/mcontacton.gif', 'graphics/nav/mcontactoff.gif');
   store.home = new imgStore('graphics/nav/mhomeon.gif', 'graphics/nav/mhomeoff.gif');
}