function doMenu(m) {

    if (isNaN(m)) return;

    var ua = window.navigator.userAgent;
    var msie = ua.indexOf ( "MSIE" );
    if ( msie < 0 ) {
        //return;
        MenuList = document.getElementById("MenuList");

        for (var i = 0; i < MenuList.childNodes.length; i++) {
            temp = MenuList.childNodes[i];
            if (temp.nodeName == "LI") temp.id = "";
        }
        
        MenuList.childNodes[(2 * m) + 1].id = "selezionata";
        return;
    }

    var l = MenuList.childNodes.length ;
    if (m >= l) return;

    var li = "";
    for (var i = 0; i < l; i++) {
        li = MenuList.childNodes(i);
        li.childNodes(0).id = "";
    }
    
    MenuList.childNodes(m).childNodes(0).id = "selezionata";
   
}