Onchange event after selecting in select dropdown list in ZEND - php

Question

I have a view with a dropdown list using select tag and I want to how can i have an event or an onchange event after selecting a value in my dropdown.
here is my code in index.phtml
<?php if (count($users)): ?>
<table class="table table-hover">
<thead>
<tr>
<th>Name</th>
<th>E-mail</th>
<th>Level</th>
<th></th>
</tr>
</thead>
<?php foreach ($users as $user): ?>
<tr>
<td><?php echo $this->escapeHtml($user->first_name . ' ' . $user->last_name); ?></td>
<td><?php echo $this->escapeHtml($user->email); ?></td>
<td>
<select name="level">
<?php $level = $this->escapeHtml($user->level); ?>
<?php if ($level == 1): ?>
<option value="1" selected="selected">Administrator</option>
<option value="2">Manager</option>
<option value="3">HR Staff</option>
<?php elseif ($level == 2): ?>
<option value="1" >Administrator</option>
<option value="2" selected="selected">Manager</option>
<option value="3">HR Staff</option>
<?php elseif ($level == 3): ?>
<option value="1" >Administrator</option>
<option value="2" >Manager</option>
<option value="3" selected="selected">HR Staff</option>
<?php endif; ?>
</select>
</td>
<td style="text-align: right;">
<i class="icon-remove icon-white"></i>
</td>
</tr>
<?php endforeach; ?>
</table>
<?php else: ?>
<h3>There are no registered users available.</h3>
<?php endif; ?>
Thanks in Advance

Answer 1

create javascript function and put function in select box onchange event.
check working example on fiddle
<script>
function changeTest(obj){
alert(obj.options[obj.selectedIndex].value);
}
</script>
<select name="level" onChange="changeTest(this)">
<option value="1" selected="selected">Administrator</option>
<option value="2">Manager</option>
<option value="3">HR Staff</option>
</select>