var count=0;
var limit=new Array();
var countlimit=1;
function expandIt(el) {
obj = eval("sub" + el);
	if (obj.style.display == "none") {
		obj.style.display = "block";
		if (count<countlimit) {
		limit[count]=el;
		count++;
		}
		else {
		eval("sub" + limit[0]).style.display = "none";
		for (i=0;i<limit.length-1;i++) {limit[i]=limit[i+1];}
		limit[limit.length-1]=el;
		}
	}
	else {
	obj.style.display = "none";
	var j;
	for (i=0;i<limit.length;i++) {if (limit[i]==el) j=i;}
	for (i=j;i<limit.length-1;i++) {limit[i]=limit[i+1];}
	limit[limit.length-1]=null;
	count--;
	}
}