function checkVersion() {
    if ((navigator.appVersion) && (navigator.appVersion.charAt(0)>=3))
        return true;
    else return false;
}

// preload rollover images for main navigation
if (checkVersion()) {   
    pre_home = new Image();
    pre_home.src="/images/button-home-on.gif";
    pre_about = new Image();
    pre_about.src="/images/button-about-on.gif";
    pre_contact = new Image();
    pre_contact.src="/images/button-contact-on.gif";
    pre_topaz = new Image();
    pre_topaz.src="/images/button-topaz-on.gif";
    pre_garpenfargle = new Image();
    pre_garpenfargle.src="/images/button-garpenfargle-on.gif"; 
    pre_permian = new Image();
    pre_permian.src="/images/button-permian-on.gif";
    pre_solace = new Image();
    pre_solace.src="/images/button-solace-on.gif";
    pre_bwy = new Image();
    pre_bwy.src="/images/button-bwy-on.gif";
    pre_lifelist = new Image();
    pre_lifelist.src="/images/button-lifelist-on.gif";
    pre_ttw = new Image();
    pre_ttw.src="/images/button-ttw-on.gif";
    pre_rita = new Image();
    pre_rita.src="/images/button-rita-on.gif";
}

function msover(img,ref) {
    if (checkVersion())
        document.images[img].src = ref;
}
    
function msout(img,ref) {
    if (checkVersion())
        document.images[img].src = ref;
}