Autocomplete
Simple example
The Autocomplete widgets provides suggestions while you type into the field.
<script>
$(document).ready(function() {
var tags = ["ask","always", "all", "alright", "one", "foo", "blackberry", "tweet","force9", "westerners", "sport"];
$( "#tags" ).autocomplete({
source: tags
});
});
</script>
<input type='text' title='Tags' id='tags' />