Navegador = navigator.appName;
Version  = parseInt(navigator.appVersion);
if (Navegador == "Netscape" && Version < 4) BRW = "NT3";
else if (Navegador == "Netscape" && Version >= 4) BRW = "NT4";
else BRW = "IE";

function winUp(name){
        if (BRW == "NT4" && window.flotante){
                if (flotante.name == "Dist") flotante.close();
        }
        else if (window.flotante) flotante.close();

        w = 400;
        h = 480;
        strF = "window.open('"+ name +"','Dist','toolbar=0,location=0,directories=0,status=0,menubar=no,scrollbars=no,resizable=1,top=40,left=125,width=" + w + ",height=" + h + "')";
        flotante = eval(strF);
}