function apri(iddiv)
{
document.getElementById(iddiv).style.visibility = "Visible";
}
function chiudi(iddiv)
{
document.getElementById(iddiv).style.visibility = "Hidden";
}
function setover(iddiv)
{
document.getElementById(iddiv).style.background = "#cccccc";
}
function setout(iddiv)
{
document.getElementById(iddiv).style.background = "#ffffff";
}