function opinsertb(object) {
    if (document.getElementById && document.getElementById(object) != null)
         node = document.getElementById(object).style.display='block';
    else if (document.layers && document.layers[object] != null)
             document.layers[object].display = 'block';
    else if (document.all)
        document.all[object].style.display = 'block';
    return false;

}
function opremove(object) {
    if (document.getElementById && document.getElementById(object) != null)
         node = document.getElementById(object).style.display='none';
    else if (document.layers && document.layers[object] != null)
        document.layers[object].display = 'none';
    else if (document.all)
         document.all[object].style.display = 'none';

    return false;
}