JS: Force showing a popup video to user before adding item to cart

js_add_to_cart_popup.js

/**
 * Force showing a popup video to user before adding item to cart
 * Use Case: Stokke Tripp-Trapp
 */

$(document).ready(function () {
    var success_hash = 'tripptrapp-success';

    // check if this is the success page
    if(window.location.hash.substring(1) == success_hash) {
        // set a success cookie for a day so as we prevent showing the video
        // to the same user on the same day
        setCookie('TRIPPTRAPP_SUCCESS_ACHIEVED', true, 1);
        
        // call parent window addToCart()
        window.opener.addToCart();

        // close this popup
        window.close();
    }

    // on cart button click
    $("#cart_button").click(function (event) {
        // if user hasn't seen the video
        if (getCookie('TRIPPTRAPP_SUCCESS_ACHIEVED') !== 'true'){
            // show the video
            openstokke();

            // prevent item from being added in the cart
            event.preventDefault();
        }
    });

    function openstokke() {
        // be carefull when changing RETURNSUCCESS,
        // so as to not remove '%23tripptrapp-success'. '%23' => #
        var newWin =
            window.open('http://media.stokke.com/tripptrapp/movie.aspx?'
                    + 'lang=el'
                    + '&RETURNSUCCESS=MY_RETURN_URL%23' + success_hash, null,
                'fullscreen=no,titlebar=no,status=no,toolbar=no,menubar=no,location=no,scrollbars=no')
    };

    function setCookie(c_name, value, exdays) {
        var exdate = new Date();
        exdate.setDate(exdate.getDate() + exdays);
        var c_value = escape(value) + ((exdays == null) ? "" : "; expires=" + exdate.toUTCString());
        document.cookie = c_name + "=" + c_value;
    };

    function getCookie(c_name) {
        var i, x, y, ARRcookies = document.cookie.split(";");
        for (i = 0; i < ARRcookies.length; i++) {
            x = ARRcookies[i].substr(0, ARRcookies[i].indexOf("="));
            y = ARRcookies[i].substr(ARRcookies[i].indexOf("=") + 1);
            x = x.replace(/^\s+|\s+$/g, "");
            if (x == c_name) {
                return unescape(y);
            }
        }
    };
});

// this function has been added to the global scope
// so as the popup window can access it
function addToCart() {
    $("#cart_button").trigger('click');
};