function openwin270x250(val) {
 var winFeatures = 'width=270,height=250,scrollbars=no,resizable=no';
 win = open(val,'win270x250',winFeatures);
 if (parseInt(navigator.appVersion) == 2 && (navigator.appVersion.indexOf('Mac') != -1)) {win = open(val,'win270x250',winFeatures)}
 if (!(self.opener)) {win.opener = top.self;}
}