pbswin = null;
function PBSpopup(f) {
        if (pbswin==null || pbswin.closed()) {
        pbswin = window.open('', 'PBSgateway', 'dependent=1,width=500,height=400,scrollbars=1,status=1,resizable=1,titlebar=1');
        }
        pbswin.focus();
        if(!self.name) {
        self.name = 'shop';
    }
        if (!pbswin.opener) {
        pbswin.opener = self;
    }
        f.opener.value = self.name;
        return true;
}