function toggle(oLink, iNum) {
	var sId = oLink.href.match(/#(\w.+)/)[1];
	var oContainer = document.getElementById("swapEnvelope");
	var aSwap = oContainer.getElementsByTagName("div");
	var aList = document.getElementById("content").getElementsByTagName("li");
	var oCopyright = document.getElementById("copyright");
	var oFootnote = document.getElementById("footnote");
	
	if (sId != "map") {
		oCopyright.style.display = "block";
		oFootnote.style.display = "block";
	} else {
		oCopyright.style.display = "none";
		oFootnote.style.display = "none";
	}
	for (var i = 0; i < aList.length; i++) {
		aList[i].className = "";
	}
	for (var i = 0; i < aSwap.length; i++) {
		if (aSwap[i].id == sId && sId != "all") {
			aSwap[i].style.display = "block";
			oLink.parentNode.className = "selected";
		} else {
			aSwap[i].style.display = "none";
		}
	}
}