function ShowLoadingPanel(parent) {
    parent.prepend('<div id="loadingPanel" class="loadingPanel"><img src="/res/imgLayout/ajax-loader.gif" width="32" height="32" alt="loading" /><br /><strong>Načítám</strong></div>');
    var width = $(window).width();
    var height = $(window).height();
    //loadingPanel.fadeIn(200);    // fast fade in of 200 mili-seconds

    var loadingPanel = $("#loadingPanel");

    loadingPanel.css({
        top: ((height / 2) - (loadingPanel.height() / 2) + document.body.scrollTop),
        left: ((width / 2) - (loadingPanel.width() / 2))
    }).fadeIn(200);    // fast fade in of 200 mili-seconds*/
}

function HideLoadingPanel(loadingPanel) {
    loadingPanel.fadeOut(1000);
}