function hideIt() {
    if (document.getElementById) {
        document.getElementById("popLayer").style.visibility='hidden';
    }

    if (document.layers) {
        document.layers["popLayer"].visibility='hide';
    }
}

function showIt() {
    if (document.getElementById) {
        document.getElementById("popLayer").style.visibility='visible';
    }

    if (document.layers) {
        document.layers["popLayer"].visibility='show';
    }
}