I have an ASP.Net web form and I need to add a drop down selector, "ActivityList", that when an item is selected will put the value, e.g. "120" into a text box, "ActivityCode".
<select name="ActivityList" id="ActivityList" size="1">
<option value="120">Job Search Job Readiness</option>
<option value="210">Community Service</option>
<option value="220">Work Experience</option>
<option value="731">Vocational Training</option>
<option value="310">Job Skills Training Directly Related</option>
<input type="text" name="ActivityCode" id="ActivityCode" />