Quiero que cada campo de texto muestre un mensaje en la página del carrito cuando un cliente escriba un texto.

 <input name="words1" rows="4" cols="40" onkeyup="return check_length(this, words2, words3, words4)"> Word count: <span id="words1_count">0</span> <input name="words2" rows="4" cols="40" onkeyup="return check_length(this, words1, words3, words4)"> Word count: <span id="words2_count">0</span> <input name="words3" rows="4" cols="40" onkeyup="return check_length(this, words1, words2, words4)"> Word count: <span id="words3_count">0</span> <input name="words4" rows="4" cols="40" onkeyup="return check_length(this, words1, words2, words3)"> Word count: <span id="words4_count">0</span> Words remaining: <span id="words_remaining">400</span> ***