suggest.js

function suggest(element) {
	var query = element.val();
	$.ajax({
		url: "api/suggest.php",
		dataType: "json",
		data: "q=" + query,
		success: function(data) {
			element.val(data.suggestion);
	  	}
	});
}
$(document).ready(function() {
	$('#query').focus();
	$('#query').live('keydown', function(e){
		var keyCode = e.keyCode || e.which; 
		if (keyCode == 9) { 
		    e.preventDefault();
		    suggest($('#query'));
		} 
	});
});