History States JS/JQuery Function

// HISTORY JS
// ====================================================================
// This file contains all history, transitions and animatinos between pages.
// ====================================================================

var History = {

    entries: [],

    getSize: function(data) {
        return this.entries.length;
    },

    addEntry: function(action) {

        // Check to see if Entry exists, if not, add it
        if ( $.inArray(action, this.entries) == -1 ) {
            this.entries.push(action);
        }
        console.log(this.entries);

    },

    rewind: function(action) {

        if (this.getSize() <= 0) {
            return false;
        }

        // Remove last item from array
        this.entries.pop();

        // List current section
        var currentSection = this.entries[this.entries.length - 0];

        // List previous section
        var prevSection = this.entries[this.entries.length - 1];

        // Pull the current section Div ID
        var $container = $('#patientFlow .panel:visible').prop('id');

        // Hide the current section
        $('#' + $container).hide();

        // Show previous section of form
        effect[prevSection]();

        // Hide Back button from first section of form
        if ( this.entries.length == 1 ) {
            $backBtn.css('visibility', 'hidden');
        }

        return true;

    }

}