function fireDefaultButton(event, target)
{
  var element = event.target || event.srcElement;
  if (event.keyCode == 13 && !(element && (element.tagName.toLowerCase() == "textarea")))
  {
    defaultButton = document.getElementById(target);
    if (defaultButton && typeof(defaultButton.click) != "undefined")
    {
      defaultButton.click();
      event.cancelBubble = true;
      if (event.stopPropagation) event.stopPropagation();
      return false;
    }
    else if(defaultButton.tagName.toLowerCase() == "a")
    {
      window.location = defaultButton.href;
    }
  }
  return true; 
}