// pomocí JavaScriptu nastavuji BLOCK nebo NONE css paramentr DISPLAY u objektu
// ****************************************************************************

function displayOn(objectID){
    document.getElementById(objectID).style.display = "block";
    return false;
}

function displayOff(objectID){
    document.getElementById(objectID).style.display = "none";
    return false;    
}



function display(objectID){

    if (document.getElementById(objectID).style.display == "block"){
        displayOff(objectID);
    }
    else {
        displayOn(objectID);
    }
    
}