function popupImage(url, width, height, scrollbars)
{
  use_scrollbars = (scrollbars == true || scrollbars == 'yes') ? 'yes' : 'no';

  var args = 'toolbar=no,location=no,directories=no,status=no,menubar=no,'
             + 'scrollbars=' + use_scrollbars + ',resizable=yes,copyhistory=no,'
             + 'width=' + width + ',height=' + height
             + ',screenX=50,screenY=50,top=50,left=50';
  var w = window.open(url,'enlarge',args);
  w.focus();
}

function RemoveFormatString(TargetElement, FormatString) {
  if (TargetElement.value == FormatString)
    TargetElement.value = "";
    TargetElement.select();
}