Make elements visible / hidden on drop down values
<html>
Display Element
<select id="display" name="form_select" onchange="showDiv()">
<option value="no">No</option>
<option value="yes">Yes</option>
</select>
<div id="hidden_div" style="display:none;">Hello hidden content</div>
<script type="text/javascript">
function showDiv()
{
if(document.getElementById('display').value=="yes")
document.getElementById('hidden_div').style.display = "block";
else
document.getElementById('hidden_div').style.display = "none";
}
</script>
</html>
