function err(){return true}
window.onerror = err;

var W3C = document.getElementById? true : false;
var NN4 = document.layers? true : false; 
var IE4 = document.all? true : false; 

function help(id) {
oldid = top.banner.document.helpform.lasthelp.value;
if (W3C) {
top.banner.document.getElementById(oldid).style.visibility = 'hidden';
top.banner.document.getElementById(id).style.visibility = 'visible';
top.banner.document.getElementById(oldid).style.display = 'none';
top.banner.document.getElementById(id).style.display = 'block';
}
else if (NN4) {
top.banner.document.layers[oldid].visibility = 'hide';
top.banner.document.layers[id].visibility = 'show';
}
else if (IE4) {
top.banner.document.all[oldid].style.visibility = 'hidden';
top.banner.document.all[id].style.visibility = 'visible';
}
top.banner.document.helpform.lasthelp.value = id;
}