I want to show how to create a native autocomplete list using HTML5 input list attribute and datalist element. Although it has not very nice support, it would be a nice alternative in the future.
How it works
You only have to add the list attribute to an input field, and create a datalist element. Its id must be the same as the list value of the input.
<input list="countries">
<datalist id="countries">
<option>Spain</option>
<option>England</option>
<option>Argentina</option>
<option>Germany</option>
<option>Brasil</option>
</datalist>Browser support
Safari has no support for datalist element. For other browsers, the support is very well. Check the current support here.