var NE, NE6, IE = false;

if (navigator.appName == "Netscape") {
    if ( parseInt(navigator.appVersion) == 4) {
        NE = true
    }else if(parseInt(navigator.appVersion) >= 5) {
        NE6 = true
    }
}else if(navigator.appName == "Microsoft Internet Explorer") {
    IE = true
}

function folWin(site) {
    if ( site == 'b' ) {
     url = "http://62.48.103.110"; 
     win = "belwin"
    }else{
     url = "http://62.48.103.120"
     win = "giuwin"
    }
    newwin = window.open(url,win,'width=800,height=600,resizable=1,scrollbars=1,toolbar=1');

    // this immediate close is a trick for IE, to avoid "access forbidden"
    if ( IE ) {
        newwin.close;
    }
    if (newwin.opener == null) { 
        newwin.opener = window;
    }
    newwin.opener.name = 'opener';
}