var _focus;


function clickedOutsideElement(elemId, evt) {
	var e = '';
	if(window.event) { e = getEventTarget(window.event); }
	else { e = getEventTarget(evt); }

	if (e.id == elemId.id) {
		if(elemId.firstChild.style.display == 'block') {
			elemId.firstChild.style.display = 'none';
			_focus = '';
		}
		else {
			elemId.firstChild.style.display = 'block';
		}
	}
	else {
		elemId.firstChild.style.display = 'none';
		_focus = '';
	}
}

function getEventTarget(evt) {
	var targ = (evt.target) ? evt.target : evt.srcElement;
	if(targ != null) {
		if(targ.nodeType == 3)
		targ = targ.parentNode;
	}
	return targ;
}

document.onclick = function(evt) {
	if (_focus) {
		clickedOutsideElement(_focus, evt);
	}
}