var NS4 = document.layers;
var IE4 = document.all;
var FF = document.getElementById && !document.all;

function showHide(div) {
	if (NS4) {
		target = document.layers[div];
		if (target.className == "DD-hidden") {
			target.className = "DD-visible";
		} else {
			target.className = "DD-hidden";
		}
	} else if (IE4) {
		if (document.all[div].className == "DD-hidden") {
			document.all[div].className = "DD-visible";
		} else {
			document.all[div].className = "DD-hidden";
		}
	} else if (FF) {
		if (document.getElementById(div).className == "DD-hidden") {
			document.getElementById(div).className = "DD-visible";
		} else {
			document.getElementById(div).className = "DD-hidden";
		}
	}
}