function $(s) {
	return document.getElementById(s);
}

//------------------------------------------------------------------------------
//------------------------------------------------------------------------------

var showHideObj = "";
function showHide(id) {
	if ($(id).style.display == "") {
		$(id).style.display = "none";
		showHideObj			= "";
	} else {
		if (showHideObj != "") {
			$(showHideObj).style.display = "none";
		}
		$(id).style.display	= "";
		showHideObj			= id;
	}
}