root/contributed_modules/modules/capturegroups/form_template.tpl

<script>
  function setDefaultContext()
  {
    var chBoxContext = document.getElementById("chBoxContext");
    var inputContext = document.getElementById("inputContext");
    if (chBoxContext.checked)
    {
      inputContext.value = "{context_default}";
    }
    inputContext.readOnly = chBoxContext.checked;
  }

  function setDefaultVirtualExtension()
  {
    var chBoxVExt = document.getElementById("chBoxVExt");
    var inputVExt = document.getElementById("inputVExt");
    var vExtenRelease = document.getElementById("inputVExtenRelease")
    var nextVExt = {next_v_exten}; 
    if (chBoxVExt.checked && nextVExt <= parseInt(inputVExt.value))
    {
      vExtenRelease.value = inputVExt.value;      
      inputVExt.value = nextVExt;
    }
    else
    {
      str = inputVExt.value;
      if (str.replace(/\s/g,"") != "")
      {           
        if (chBoxVExt.checked)
        {     
          if (confirm('¿La extension virtual actual es menor que la proxima disponible aún así quiere asignarla?'))
          {
            vExtenRelease.value = inputVExt.value;          
            inputVExt.value = nextVExt;
          }
          else
          {
            chBoxVExt.checked= false;
          }
        }
      }
    }
    inputVExt.readOnly = chBoxVExt.checked;
  }

</script>

{messages}
<form method="post" name=capturegroups action="{form_url}">
<table>
      <tr>
        <td colspan="2"><h5>{form_title}</h5> <hr /> </td>
      </tr>     
      <tr>
        <td><label>Context:</label></td>
        <td><input type="text" name= "desc" value="{desc}" id="inputContext" />  <input type="checkbox" name="contextDefault" value="" onclick="setDefaultContext();" id="chBoxContext" {check_context}> Use default</td>
        
      </tr>     
      <tr>
        <td><label>Virtual Extension:</label></td>
        <td><input type="text" name= "v_exten" value="{v_exten}" id="inputVExt" /> <input type="checkbox" name="contextDefault" value="" id="chBoxVExt" {check_v_exten} onclick="setDefaultVirtualExtension();"> Use next virtual extension available</td>        
      </tr>
      <tr>
        <td colspan="2"><hr /></td>
      </tr>
      <tr>
        <td colspan="2" align="center"><a href="#" class="info"><span>Put extensions here</span>Extensions</a> </td>
      </tr>
      <tr>
        <td colspan="2" align="center"><textarea name="client_extensions">{client_extensions}</textarea></td>
      </tr>
      <tr>
        <td colspan="2"><hr /></td>
      </tr>
      <tr>
        <td colspan="2" align="center">
<input type="hidden" name="v_exten_release" value="{v_exten_release}" id="inputVExtenRelease" />
<input type="hidden" name="captgroup_desc_edit" value="{captgroup_desc_edit}" /> <input type="submit" name="submit{action}" value="Save" /> {delete_button}</td>
      </tr>
</table>
</form>