Adding A Text field's value to a select option

[Wizard13335]

Hello again, it is me, Wizard13335, ever seeking complete JavaScript knowledge. I was looking for a script that would put a text feild's entry into a <select> option value. I think it would be a kind of modified version of this:

<select 
onchange="document.getElementById('tx').value+=this.value;">  
<option value="Happy Easter!">Happy Easter!</option>  <option 
value="Merry Christmas!">Merry Christmas!</option>  <option 
value="Happy New Years!">Happy New Years!</option> </select>
 <textarea id="tx"></textarea>

which i got from another thread, but instead of the option value going into the text box, a text fields entry would be going into a select option.
This probably isn't possible, but please reply soon if you have found or already know how to do it.
Thanks

[Wizard13335]

Nevermind. I don't really need it anyway.