function showdd(theid)
{
    hidedd('1');
    hidedd('2');
    hidedd('3');
    hidedd('4');
    hidedd('5');
    hidedd('6');


    document.getElementById(theid).style.visibility = "visible";
}

function showddd(theid)
{
    document.getElementById(theid).style.visibility = "visible";
}

function hidedd(theid)
{
    document.getElementById(theid).style.visibility = "hidden";
}