displaying text box from list menu

I am pretty new to javascript and i am trying out something simple.

I would like the text box to appear or disappear depending on if the 'other' menu item is selected. So something like:

<select name='list'>
<option value='empty'> empty </option>
<option value='empty2'> empty2 </option>
<option value='show_text_box'> show text box</option>
</select>

<script>
if (document.list.value == 'show_text_box')
{
document.write("<input type='text' name='text_box'>");
}
<script>

Can something like this be done? I'm struggling to figure out certain aspects of javascript.

 

I know i can simple change the display from hidden to block using javascript but that's not what i am trying to do.

 

You are trying to access the drop-down wrongly. You should use the following way:

if (document.getElementById("list").value == 'show_text_box') {
document.write("<input type='text' name='text_box'>");
}

Code (markup):

 

Thanks a lot for the reply. I've been trying to allow it to take effect to multiple selects showing a textbox for each one that selects 'other'. I am trying to not repeat code.
I'm trying to get it to a point where i don't have to pass any parameters, or at least i only have to pass in one parameter...

This is what i've ended up with so far, for now this is good enough... But it shouldn't be this much work to use... It should be shorter and quicker.

<script type="text/javascript">
function box(x, xo){
  var x = document.getElementById(x).value;

  var div = document.getElementById(xo);

  if (x == 'other')
    div.innerHTML = "<input type='text' name='" + xo + "'>";
  else
    div.innerHTML = '';
}
</script


Select your favorite language:
<select id="lang" onchange='box("lang", "langO");'>
  <option>PHP</option>
  <option value='other'>other</option>
</select>
<div id='langO'> </div>
<br><br>


Select your favorite color:
<select id="color" onchange='box("color", "colorO");'>
  <option>red</option>
  <option value='other'>other</option>
</select>
<div id='colorO'> </div>

Code (markup):

 

I changed the code a bit so it's better and easier to use with PHP. If anyone cares for it i'll post it. It's very simple and easy to use.