function openwin(url,w,h,scroll) {
  scrwidth=screen.width;scrheight=screen.height;
  leftmargin = (scrwidth - w)/2;topmargin = 15;
  props = "left=" + leftmargin + ",";props = props + "top=" + topmargin + ",";props = props + "width=" + w+ ",";props = props + "height=" + h+ ",";
  var windowprops= "left=" + leftmargin +",top=" + topmargin +",width="+w+",height="+h+",toolbar=no,location=no,status=yes,menubar=no,resizable=no,scrollbars=yes";
  popup=window.open(url,'pop',windowprops);
  popup.focus();
}

function openwin2(url,w,h,scroll) {
  scrwidth=screen.width;scrheight=screen.height;
  leftmargin = (scrwidth - w)/2;topmargin = 50;
  props = "left=" + leftmargin + ",";props = props + "top=" + topmargin + ",";props = props + "width=" + w+ ",";props = props + "height=" + h+ ",";
  var windowprops= "left=" + leftmargin +",top=" + topmargin +",width="+w+",height="+h+",toolbar=no,location=no,status=yes,menubar=no,resizable=no,scrollbars=" + scroll;
  popup=window.open(url,'pop',windowprops);
  popup.focus();
}

function openwintop(url,w,h,scroll) {
  scrwidth=screen.width;scrheight=screen.height;
  leftmargin = (scrwidth - w)/2;topmargin = 0;
  props = "left=" + leftmargin + ",";props = props + "top=" + topmargin + ",";props = props + "width=" + w+ ",";props = props + "height=" + h+ ",";
  var windowprops= "left=" + leftmargin +",top=" + topmargin +",width="+w+",height="+h+",toolbar=no,location=no,status=yes,menubar=no,resizable=no,scrollbars=yes";
  popup=window.open(url,'pop',windowprops);
  popup.focus();
}