javascript - Input not appearing when executing function -


i need when option "otros" of select clicked, input appears. so, have made script not working fine (input not appear).

html/php

<select onclick='atencion_otros()' id="atencion" name="atencion">     <option selected>atención</option>     <option>otros</option>     <?php if($copy){ echo '<option selected>' . $atencion . '</option>';     $result = mysqli_query($con,"select * `contactos_pmt` order nombre_contacto");     while($row = mysqli_fetch_array($result)){      ?> <option> <?php echo $row['nombre_contacto']; ?> </option>      <br><br><?php      }     }     if($cargar_cliente){     $result = mysqli_query($con,"select * `contactos_pmt`      nombre_empresa = '$nombre_cliente' order nombre_contacto");     while($row = mysqli_fetch_array($result)){      ?> <option selected> <?php echo $row['nombre_contacto']; ?> </option>      <br><br><?php      }     }     ?> </select> <input onkeypress="return event.keycode != 13;" style="display:none;" id="atencion_otros" name="atencion_otros" placeholder="atención" />

javascript

<script type="text/javascript">   function atencion_otros() {     if (document.getelementbyid('atencion').value == 'otros') {         document.getelementbyid('atencion_otros').style.display = 'block';     } else {         document.getelementbyid('atencion_otros').style.display = 'none';     }   } </script>

do have idea of why input not appearing?

first add value attributes in <option>.

then add event listener.

document.addeventlistener('domcontentloaded',function() {     document.getelementbyid('atencion').onchange=atencion_otros; },false);

now function

function atencion_otros() {     if (document.getelementbyid('atencion').value == 'otros') {         document.getelementbyid('atencion_otros').style.display = 'block';     } else {         document.getelementbyid('atencion_otros').style.display = 'none';     }   }

now remove onclick attribute <select>.


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