var DOM = (document.getElementById)?true:false;
var NN = (document.layers)?true:false;
var IE = (document.all)?true:false;
var NN6 = DOM;
var Opera = DOM && window.opera;

function hideObject(el) {
	el.style.display = 'none';
	if (NN) el.visibility = 'hide';
	else el.style.visibility = 'hidden';
}

function showObject(el) {
	el.style.display = 'block';
	if (NN) el.visibility = 'show';
	else el.style.visibility = 'visible';
}

function $(o) {
	if (IE) return document.all[o];
	if (NN) return getNNElement(null, o);
	if (DOM) return document.getElementById(o);
}