var getContextMenuItems = function (selection) {
    var menu = [];

    menu.push({
        title: "action 1",
        action: function () {
            alert("action 1");
        }
    });
    menu.push({
        title: "action 3",
        action: function () {
            alert("action 3");
        }
    });
    if (selection.length > 1) {
        menu.push({
            title: "action multiple",
            action: function () {
                alert("action multiple");
            }
        });
    }

    var htmlMenu = document.createElement('ul');

    menu.forEach(function (item) {
        var li = document.createElement('li');
        li.innerHTML = item.title;
        li.onclick = item.action;
        htmlMenu.appendChild(li);
    });

    return htmlMenu;
}

var getContextMenuFolders = function (selection) {
    var htmlMenu = '<ul>' +
    '<li onclick="alert('action dossier 1');">action dossier 1</li>' +
    '<li onclick="alert('action dossier 3');">action dossier 3</li>' +
    '</ul>';

    return htmlMenu;
}

document.getElementById('itemsList').mkaInit({
    "eltsSelectable": "li",
    "rightClick": getContextMenuItems,
    "lasso": false,
    "selectAllShortcut": false,
    "copyPaste": false,
    "count": "mka-count-items",
});

document.getElementsByClassName('folders-container').item(0).mkaInit({
    "eltsSelectable": ".folder",
    "onDragItemClass": "drag-class-sample",
    "rightClick": getContextMenuFolders,
    "lasso": true,
    "selectAllShortcut": true,
    "copyPaste": true,
    "count": "mka-count-folders",
});