function Show(what) {
	i = document.getElementById("i"+what);
	d = document.getElementById(what);
	if(i.src.indexOf("plus") != -1) {
		i.src = "i/minus.gif";
		d.style.display = "block";
	}
	else {
		i.src = "i/plus.gif";
		d.style.display = "none";
	}
	return false;
}