function show(object) {
    if (document.layers && document.layers(object))
        document.layers(object).visibility = 'visible';
    else if (document.getElementById)
        document.getElementById(object).style.visibility = 'visible';
}

function hide(object) {
    if (document.layers && document.layers(object))
        document.layers(object).visibility = 'hidden';
    else if (document.getElementById)
        document.getElementById(object).style.visibility = 'hidden';
}