function openMenuByIndex(menuIndex) {
  document.getElementById("ctl00_cph_Box" + menuIndex).style.visibility = "visible";
  document.getElementById("ctl00_cph_Box" + menuIndex).style.height = "auto";
  document.getElementById("ctl00_cph_Box" + menuIndex).style.display = "block";
}

function closeMenuByIndex(menuIndex) {
  document.getElementById("ctl00_cph_Box" + menuIndex).style.visibility = "hidden";
  document.getElementById("ctl00_cph_Box" + menuIndex).style.height = "0px";
  document.getElementById("ctl00_cph_Box" + menuIndex).style.display = "none";
}

/* Funções necessárias para exibir e ocultar a div de filtros, aplica efeitos e altera a imagem de da seta de acordo com evento disparado.*/
 jQuery(function() {
        // Preload de imagens.
        (function() {
            var imagens = [
                "/img/icons/collapse.gif",
                "/img/icons/expand.gif"
            ];
            for (var i = 0; i < imagens.length; i++) {
                new Image().src = imagens[i];
            }
        })();
    });

    jQuery('#lnkFilter').click(function() {
        jQuery('$[id$=pnlFilter]').slideToggle(function() {
            var imageName = jQuery(this).is(":hidden") ? "collapse" : "expand";
            jQuery('$[id$=imgFilter]').attr('src', '/img/icons/' + imageName + '.gif');
        });
    });