function openNewWindow(w,h)
{
var nw=w+10;
var nh=h+10;
windowfeatures="'toolbar=no,location=no,directories=no,status=no,scrollbars=no,menubar=no,resizable=yes,width="+nw+",height="+nh+"'";
newWindow=window.open( '' ,'subwindow',windowfeatures);
} 

function opencertificate()
{
window.open('iso-certificate.html','welcome','width=517,height=707,scrollbars=yes');
}