function hidShow(ddd) {
if (document.getElementById(ddd).style.visibility == "visible")
{
document.getElementById(ddd).style.visibility = "hidden";
document.getElementById(ddd).style.display = "none";
}
else
{
document.getElementById(ddd).style.visibility = "visible";
document.getElementById(ddd).style.display = "block";
}
}

function hdEl(ddd) {
document.getElementById(ddd).style.visibility = "hidden";
document.getElementById(ddd).style.display = "none";
}

function shEl(ddd) {
document.getElementById(ddd).style.visibility = "visible";
document.getElementById(ddd).style.display = "block";
}