function op(x) {
	s = "false";
	if (document.getElementById("c"+x).style.display=="block") s = "true";
	for (i=1;i<=2;i++){
		a=eval("document.getElementById('c"+i+"')");
		a.style.display="none";
		b=eval("document.getElementById('img"+i+"')");
		b.src="images/plus.gif";
	}
	b = document.getElementById("Moo").style;
	if(s=="false") {
		if(document.getElementById("c"+x)) {
			document.getElementById("c"+x).style.display="block";
			document.getElementById("img"+x).src="images/minus.gif";
		}
	}
	b.display="none";
	b.display="block";
}