Execute function on TAB key
http://stackoverflow.com/questions/14889732/how-to-trigger-an-event-after-hitting-tab-key-in-textbox
http://jsfiddle.net/cEzLL/
<div class="row">
<!-- Text input-->
<div class="form-group col-md-6 col-xs-12">
<label class="col-md-4 control-label" for="lastName">Ship From *</label>
<div class="col-md-8">
<input id="shipfrom_zip" name="shipfrom_zip" type="text" class="form-control input-md" required="" placeholder="33166">
<input type="text" id="shipfrom_city" name="shipfrom_city">
</div>
</div><!--formgroup-->
<!-- Text input-->
<div class="form-group col-md-6 col-xs-12">
<label class="col-md-4 control-label" for="lastName">Ship To *</label>
<div class="col-md-8">
<input id="shipto_zip" name="shipto_zip" type="text" class="form-control input-md" required="" placeholder="33167">
<input type="text" id="shipto_city" name="shipto_city">
</div>
</div><!--formgroup-->
</div><!--row-->
<script>
$( document ).ready(function() {
// only execute when the second input field TAB key is pressed
$("#shipto_zip").keydown(function (e) {
if (e.keyCode === 9)
initialize() ;
});
});
</script>