var curHalfClosed = 'undefined';
var curFullOpened = 'undefined';

function open(target) {
	target.style.overflow='';
	target.style.height='100%';
	target.style.visibility='visible';
}

function close(target) {
	target.style.overflow = 'hidden';
	target.style.height = '0px';
	target.style.visibility='hidden';
}

function openClose(toOpen, toClose) {
	var toOpen = document.getElementById(toOpen);
	var toClose = document.getElementById(toClose);
	if(curFullOpened != 'undefined') {
		open(curHalfClosed);
		close(curFullOpened);
	}
	if(toOpen==curFullOpened) {
		curHalfClosed = 'undefined';
		curFullOpened = 'undefined';
		return;
	}
	open(toOpen);
	close(toClose)
	curFullOpened = toOpen;
	curHalfClosed = toClose;
}