/* selfPopup
 * open popup window with href determined from the href attribute on the anchor:
 * <a href="index.html" onclick="selfPopup(this,300,400); return false;">Index</a>
 */
function selfPopup( loc, x, y ) {
  LeftPosition = (screen.width) ? (screen.width-x)/2 : 0;
  TopPosition = (screen.height) ? (screen.height-y)/2 : 0;
  window.open(loc.href,"","toolbar=0,location=0,directories=0,status=1,menubar=0,scrollbars=1,resizable=1,copyhistory=0,width="+x+",height="+y+',left=' +LeftPosition + ',top=' +TopPosition +"");
  return false;
}