Fill textboxes after record selected by drop down

[eluser]webmarkcompt[/eluser]

Code:

[removed][removed]

[removed]
$(document).ready(function(){
$('#leather_description').hide();
$("#leather").change(function(){
$('#leather_description').hide('slow');
$("#" + this.value).show('slow');
});
});
[removed]

<!-- ADICIONAR LEATHER-->
<div class="control-group">
  <label class="control-label" id="leather">&lt;?php echo $this->lang->line("trad_leather"); ?&gt;</label>
  <div class="controls">  &lt;?php
   $leath[""] = "";
      foreach($tbl_leather as $sort){
    $leath[$sort->id] = $sort->description;
   }
  echo form_dropdown('leather', $leath,  set_value('leather'), 'id="leather" data-placeholder="'.$this-&gt;lang-&gt;line("select").' '.$this->lang->line("trad_leather").'" required="required" data-error="'.$this-&gt;lang-&gt;line("trad_leather").' '.$this->lang->line("is_required").'"'); ?&gt; </div>
        
        <div id="leather_description"> &lt;input class="input-text" type="text" name="leather_description" placeholder="Leather Description"/&gt;&lt;/div>
</div>

Hello again

How can I define the value variable to show de div leather_description?
Can you give some hint to solve this issue?
Thank you!