// quick browser tests
var ns4 = (document.layers) ? true : false;
var ie4 = (document.all && !document.getElementById) ? true : false;
var ie5 = (document.all && document.getElementById) ? true : false;
var ns6 = (!document.all && document.getElementById) ? true : false;

function show(sw,obj) {
// show/hide the divisions
if (sw && (ie4 || ie5) ) document.all[obj].style.visibility = 'visible';
if (!sw && (ie4 || ie5) ) document.all[obj].style.visibility = 'hidden';
if (sw && ns4) document.layers[obj].visibility = 'visible';
if (!sw && ns4) document.layers[obj].visibility = 'hidden';
}