var what = null;
var newbrowser = true;
var check = false;

function init() {
	if (document.getElementById) {
		layerRef = "document.getElementByID";
		styleSwitch = ".style";
		what="dom1";
	}
	else if (document.layers) {
		layerRef = "document.layers";
		styleSwitch = "";
		what ="ns4";
	}
	else if (document.all) {
		layerRef = "document.all";
		styleSwitch = ".style";
		what ="ie";
	}
	else {
		what = "none";
		newbrowser = false;
	}
	check = true;
}

function show(layerName) {
	if(check) {
		if (what == "none") {
			return;
			}
		else if (what == "dom1") {
			document.getElementById(layerName).style.visibility="visible";
			}
		else {
			eval(layerRef+'["'+layerName+'"]'+styleSwitch+'.visibility="visible"');
			}
		}
	else { return; }
	}

function hide(layerName) {
	if (check) {
		if (what == "none") {
			return;
			}
		else if (what == "dom1") {
			document.getElementById(layerName).style.visibility="hidden";
			}
		else {
			eval(layerRef+'["'+layerName+'"]'+styleSwitch+'.visibility="hidden"');
			}
		}
	else { return; }
	}

function hideAll(){
	hide('correct');
	hide('incorrect');
	}