function popup_snocap(){
  var update2=window.open("snocap.html","upwin","toolbar=no,width=500,height=350,status=no,scrollbars=no,resizable=yes,menubar=no");
  var xpos = (screen.width - w) / 2;
  var ypos = (screen.height - h) / 2;
	update2.moveTo(xpos,ypos);
	update2.focus();
}