function getBrowVer() {

        appname= navigator.appName;

        appversion = navigator.appVersion;

        mainver = appversion.substring(0, 1);

        if ((appname == "Netscape") && ( mainver >= 3 )) return 1;

        if ((appname == "Microsoft Internet Explorer") && (mainver >= 4)) return 1;

        return 0;

}



function swtch(num, picname) {

        if (getBrowVer()) {

        document[picname].src = pic[num].src;

                }

        }



picsrc=new Array();

picsrc[0]="nav/fme-1.gif";

picsrc[1]="nav/fme-2.gif";

picsrc[2]="nav/fme-3.gif";

picsrc[3]="nav/fmf-1.gif";

picsrc[4]="nav/fmf-2.gif";

picsrc[5]="nav/fmf-3.gif";

picsrc[6]="nav/fmg-1.gif";

picsrc[7]="nav/fmg-2.gif";

picsrc[8]="nav/fmg-3.gif";


if (getBrowVer()) {

        pic = new Array();

        for (i = 0; i < picsrc.length; i++) {

                pic[i] = new Image();

                pic[i].src = picsrc[i];

        }

}