Updated sametime_invoke using jQuery/AJAX/callback functions

gistfile1.js

var Instant = {};

Instant.launchSametimeConversation = function (stid) {
    var time = new Date();
    var getUrl = 'http://localhost:59449/stwebapi/chat?userId=' + stid + '&time=' + time.getTime() + '&jsonp=Instant.handleResponse';

    // Use jQuery to request the Sametime servlet URL. If a request makes it to the URL successfully, the servlet will return a code 200 and open the Sametime client chat with the user.
    // We use the Instant.handleResponse() function as a callback to process the JSONP data object that the servlet hands back.
    $.ajax({
        type: 'GET',
        url: getUrl,
        dataType: 'jsonp',
        jsonpCallback: 'Instant.handleResponse'
    });
};

// A rudimentary callback function to handle JSONP data objects retrieved by the Instant.launchSametimeConversation() function.
Instant.handleResponse = function (data) {
    if (data.returnCode === 200) {
        alert('Success!');
    } else {
        alert('Failed!');
    }
};