function loadConferences (orderBy){
    var urlStr ="/user/conferences_table.jsp?elementsPerPage=5&page=1&rnd=" + Math.random() + "&orderBy=" + orderBy;
    document.getElementById("conferences").innerHTML = getDataFromServer(urlStr);
}

function markThis(f){
    if (f != null) {
        var nameThis = f.name;
        var i;
        for (i = 0; i<document.getElementsByName(nameThis).length; i++) {
            document.getElementsByName(nameThis)[i].style.textDecoration = "none";
        }
        f.style.textDecoration = "underline";
    }
}