function oc(id){

    obj = document.getElementById (id);
    obj.style.display = (obj.style.display=="none") ? "" : "none";
}

function findObj( id )
{
    var x;
    if( !( x = document[ id ] ) && document.all ) x = document.all[ id ];
    if( !x && document.getElementById ) x = document.getElementById( id )
    
    return x;
}