function check_size (xTextarea, xSize)
{
  if(xTextarea.value.length > xSize)
    {
      xFullString = xTextarea.value;
      xTextarea.value = xFullString.substring(0,xSize);
    }
}

function check_size_msg (xTextarea, xSize, xMessage)
{
  if(xTextarea.value.length > xSize)
    {
      xFullString = xTextarea.value;
      xTextarea.value = xFullString.substring(0,xSize);
      alert(xMessage);
    }
}