// JavaScript Document

function navOn(id) {
	if (document.getElementById("img_" + id)) {
		var tmpSrc = document.getElementById("img_" + id).src;
		if ((tmpSrc.lastIndexOf("_o.gif")) != tmpSrc.length-6)
			document.getElementById("img_" + id).src = tmpSrc.substr(0,tmpSrc.length-4) + "_o.gif";
	}
	if (document.getElementById("list_" + id)) document.getElementById("list_" + id).style.visibility = "visible";
}

function navOff(id) {
	if (document.getElementById("img_" + id)) {
		var tmpSrc = document.getElementById("img_" + id).src;
		if ((tmpSrc.lastIndexOf("_o.gif")) == tmpSrc.length-6)
			document.getElementById("img_" + id).src = tmpSrc.substr(0,tmpSrc.length-6) + ".gif";
	}
	if (document.getElementById("list_" + id)) document.getElementById("list_" + id).style.visibility = "hidden";
}