ui autocomplete - Stack Overflow Question

gistfile1.js

var serverSearchField = $("#txtSearchServer");

var listServers = [];
serverSearchField.autocomplete({
    source: listServers
});

serverSearchField.keyup(function (event) {
	$.ajax({
		url: 'edit/EditService.svc/SearchServers',
		type: 'GET',
		data: { 'term': $("#txtSearchServer").val() },
		dataType: 'json',
		success: function (data) {

			$.map(data.d, function (item) {
				///working here to do server autocomplete!!!!!!!
				listServers.push(item.ServerName);

			});
			serverSearchField.autocomplete('option','source',listServers);

		},
		error: function (a, b, c) {
			$('.Toast').html('Error Retreiving Servers for autocomplete!');
		}
	});
});