function showContestNote(){
    var g = document.getElementById("ContestNote");
    
    if(g){
        g.style.display = "block";
        center(g);
    }
}

function hideContestNote(){
    var g = document.getElementById("ContestNote");
    
    if(g){
        g.style.display = "none";
    }
}

function center(object){
    object.style.marginLeft = "-" + parseInt(object.offsetWidth / 2) + "px";
    object.style.marginTop = "-" + parseInt(object.offsetHeight / 2) + "px";
 }