use jquery and while adding dynamic control add common css class to them.
for that css class write "blur" function in jquery and that will give you value of the control.
with that value call server function using jquery ajax
<input type="textbox" class="copyValue">
<select class="copyValue">
<option>One</option>
<option><two></two></option>
</select>
<script>
$(document).ready(funciton(){
bind();
});
</script>
global.js
function bind()
{
$('.copyValue').blur(function() {
});
}</input>