function Tip(elem) {
	try {
		var oHref = document.getElementById(elem);
		var oDiv = oHref.parentNode.getElementsByTagName("div")[0];
		if (oDiv.style.display != "block") {
			oDiv.style.display = "block";
		} else {
			oDiv.style.display = "none";
		}
	} catch (e) {
	}
}