function openPopup(url, name, width, height, scrollbars) {
  window.open(url, name, 'width=' + width + 'px, height=' + height + 'px, menubar=no, resizable=no, scrollbars=' + scrollbars + ', status=no, titlebar=no, toolbar=no');
}

function isNumberKey(evt)
{
  var charCode = 0;
  if ((evt != null) && (evt.which)) {
	charCode = evt.which;
  } else if (evt != null) {
	charCode = evt.keyCode;
  } else if (event != null) {
	charCode = event.keyCode ;
  }
  if ((charCode < 48 || charCode > 57) && (charCode != 8) && (charCode != 9)  && (charCode != 46)
	  && (charCode != 37) && (charCode != 38) && (charCode != 39) && (charCode != 40))
    return false;

  return true;
}