function changeSelectedItem(selectedItem) {
    if (selectedItem != "") {
        if (selectedItem == "Noticias") selectedItem = 77;
        if (selectedItem == "Subseccion") {
            var Url = location.href;
            Url = Url.replace(/.*\?(.*?)/, "$1");
            Variables = Url.split("&");
            for (i = 0; i < Variables.length; i++) {
                Separ = Variables[i].split("=");
                eval('var ' + Separ[0] + '="' + Separ[1] + '"');
            }
            selectedItem = idSeccion;
        }
        else {
            selectedItem = 77; 
        }
        var liActivo = document.getElementById(selectedItem.toString());
        liActivo.style.backgroundColor = "#333333";
        document.getElementById(selectedItem).firstChild.style.color = "#fff";
    }
    else {
        var liActivo = document.getElementById(6);
        liActivo.style.backgroundColor = "#333333";
        document.getElementById(6).firstChild.style.color = "#fff";
    }

}