Create a cookie with JavaScript

createCookie.js

    /**
     * Creates a cookie
     *
     * If expiresVal is null, only create session cookie
     * ExpiresType is either y, d, h, or m (years, days, minutes or hours)
     *
     * @param name
     * @param value
     * @param expiresVal
     * @param expiresType
     */
    function createCookie(name, value, expiresVal, expiresType) {
        var date = new Date(),
            expires = '',
            offset = 0;

        if (expiresVal) {
            switch (expiresType) {
                case 'm': // minutes
                {
                    offset = expiresVal * 60 * 1000;
                    break;
                }
                case 'h': // hours
                {
                    offset = expiresVal * 60 * 60 * 1000;
                    break;
                }
                case 'y': // years
                {
                    offset = expiresVal * 365 * 24 * 60 * 60 * 1000;
                    break;
                }
                default: // days
                {
                    offset = expiresVal * 24 * 60 * 60 * 1000;
                    break;
                }
            }

            date.setTime(date.getTime() + offset);
            expires = ';expires=' + date.toGMTString();
        }

        document.cookie = name + '=' + value + expires + ';path=/';
    }