<script>
function makeChange(){

if (frmMain.lstAnswer.options[1].selected)
frmMain.lstResult.options[2].selected = true;
}
</script>

<form NAME = "frmMain">
<select NAME = "lstAnswer" ONCHANGE = "makeChange();">
<option VALUE = "Any">Any</option>
<option VALUE = "Yes">Yes</option>
<option VALUE = "No">No</option>
</select>
<select NAME = "lstResult">
<option VALUE = "First">First</option>
<option VALUE = "Second">Second</option>
<option VALUE = "Third">Third</option>
</select>
</form>