gistfile1.html

<script type="text/javascript" charset="utf-8">
	$(document).ready(function() {
		$('input.text').keyup(function() {
			if ($(this).val().length > 0) {
				$(this).next('input.text').focus();
			}
		});
	});
</script>

<p>
	<input type="text" name="algo" value="" class="text" />
	<input type="text" name="algo" value="" class="text" />
	<input type="text" name="algo" value="" class="text" />
</p>