{
        return tablesList.length === 0
    }

    function isSelectedSharedPrefs() {
        return selectedSharedPrefs != null && selectedSharedPrefs !== "";
    }

    function isNumber(str) {
        return /^\d+$/.test(str);
    }

    function clearContent(element) {
        element.innerHTML = '';
    }

    function getElementById(id) {
        return document.getElementById(id);
    }

    function getElementsByClassName(name) {
        return document.getElementsByClassName(name);
    }

    func