var accordion = new Accordion({
        duration: 600, // animation duration in ms {number}
        itemNumber: 0, // item number which will be shown {number}
        aria: true, // add ARIA elements to the HTML structure {boolean}
        closeOthers: true, // show only one element at the same time {boolean}
        showItem: false, // always show element that has itemNumber number {boolean}
        elementClass: 'ac', // element class {string}
        questionClass: 'ac-q', // question class {string}
        answerClass: 'ac-a', // answer class {string}
        targetClass: 'ac-target' // target class {string}
        });