$('.selector').infinitescroll({
        debug: false,               // Toggle diplays of debugging messages via console.log().
        infid: 0,                   //Instance ID

        // Page result loading params.
        loading: {
            // Function hooks.
            start: undefined,       // Triggers BEFORE first fetch of the next page results.
            finished: undefined,    // Triggers AFTER appending the data to existing results list.

            // Message display params.
            selector: null,         // Puts the load message in a specific selector. Defaults to the contentSelector.
            msgText: '<em>Loading the next set of posts...</em>',
            finishedMsg: "<em>Congratulations, you've reached the end of the internet.</em>",
            msg: null,              // Contains the HTML of the loading message. Gets generated from the option values.
            speed: 'fast',          // When 'animate' is TRUE it sets the speed of the jQuery animate function.
            img: 'img/loading-spinner.gif',
        },
        state: {
            isDuringAjax: false,
            isInvalidPage: false,
            isDestroyed: false,
            isDone: false,          // TRUE when no more results pages to fetch.
            isPaused: false,
            isBeyondMaxPage: false,
            currPage: 1
        },

        errorCallback: function () { }, // Callback function
        behavior: undefined,        // Used to over-ride a single default function behaviour.
                                    // Requires a function added to the initialization options that begins with the same function name you want to 
                                    // over-ride followed by the underscore '_', and followed by whatever unique string value you set in 'behaviour'.

        // jQuery selectors.
        navSelector: 'a [title="Next"]',
        nextSelector: 'div.navigation a:first',
        itemSelector: 'div [data-ad-id]',
        contentSelector: undefined, // Page fragment' option for .load() / .ajax() calls.
        binder: $(window),          // Cache reference to selector.

        // Positioning params.
        animate: false,             // Use smooth scrolling to ease in the new content.
        bufferPx: 40,               // Add extra height to distance remaining in the scroll area. Used when calculating trigger for next page load.
        extraScrollPx: 150,         // Add extra height when smooth scrolling in new content.
        pixelsFromNavToBottom: undefined,   // Used when calculating trigger for next page load.
        prefill: false,             // IF the document is smaller than the window THEN load data until the document is larger OR links are exhausted.

        // Result page number params.
        path: undefined,            // Either parts of a URL as an array (e.g. ["/page/", "/"] or a function that takes the page number and returns a URL.
        pathParse: undefined,       // Callback function to parse the HREF of [Next Page] <A> element to extract the page number.
        pathMatch: false,           // Check if current browser path is same as ajax pagination path
        maxPage: undefined,         // Manually controls maximum page: (IF maxPage is undefined THEN maximum page limitation will not work).

        // AJAX params.
        appendCallback: true,       // Append next page of returned items to existing result list or not.
        dataType: 'html',           // Default datatype of fetched paged results. Values are: ()'html', 'html+callback', 'json')
        template: undefined         // IF dataType == 'json' AND appendCallback == TRUE THEN you must define this function to parse JSON to HTML.
    });

$('.selector').infinitescroll({
  behavior: 'local',
  binder: $('.selector'), // scroll on this element rather than on the window
  // other options
});

$('.selector').infinitescroll({
  // other options
  dataType: 'json',
  appendCallback: false
}, function(json, opts) {
  // Get current page
  var page = opts.state.currPage;
  // Do something with JSON data, create DOM elements, etc ..
});