/* Open PopUp */

function openPopUp( url, w, h )
{
  var l = Math.floor((screen.width-w)/2);
  var t = Math.floor((screen.height-h)/2);
  popupWindow = window.open( url, null, 'width=' + w + ',height=' + h + ",top=" + t + ",left=" + l + ',status=0,toolbar=0,location=0,menubar=0,directories=0,resizable=0,scrollbars=yes' );
  popupWindow.focus();
}