function popUpCenteredWindow(url, wname) {
  var iMyWidth;
  var iMyHeight;
  var cMyWidth;
  var cMyHeight;
  var newwin;
  iMyWidth = (window.screen.width) * .70;
  iMyHeight = (window.screen.height) * .90;
  cMyWidth = ((window.screen.width) - iMyWidth) / 2;
  cMyHeight = ((window.screen.height) - iMyHeight) / 80;

  newwin = window.open(url, wname, "status=0,width=600,height=500,resizable=yes,screenX=cMyWidth,screenY=cMyHeight,scrollbars=yes,titlebar=yes,toolbar=yes");
  newwin.focus();
}