Dynamically changing the values in a drop down list in Visual Studio / Visual Web Developer

I have two drop down boxes.

DDAccomm & DDPrice

DDAccomm is bound to my database and gets it's values from a table.

DDPrice is hard coded

I want DDAccomm to change the values of DDPrice according to what is selected

e.g. If then selection of DDaccomm is position 1 or 2 then leave, if it's position 3 or 4 then change the values.  These values are not to come from the DB.

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As you know what the values will be, you can store them in arrays, and use CSS to show/hide them as required:

<script type="text/javascript">
var odd = new Array("one", "three", "five");
var even = new Array("two", "four");

function hide(numberType) {
      for (var i=0; i<numberType.length; i++) {
            document.getElementById(numberType[i]).style.display = "none";
function show(numberType) {
      for (var i=0; i<numberType.length; i++) {
            document.getElementById(numberType[i]).style.display = "block";
<p>Show <a href="#" onclick="hide(even); show(odd); return false;">odd numbers</a>.</p>
<p>Show <a href="#" onclick="hide(odd); show(even); return false;">even numbers</a>.</p>
      <option id="one">1</option>
      <option id="two">2</option>
      <option id="three">3</option>
      <option id="four">4</option>
      <option id="five">5</option>


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nickrjsmithAuthor Commented:
i used on selected index change although this solution would have worked too
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