document.onmousedown = function(ev) {
	var ev = ev || window.event;
	var target = ev.target || ev.srcElement;
	if (target.id == 'alert' || target.parentNode.parentNode.id == 'alert'){
		return;
	} else {
		var node = (document.getElementById('alert'));
        if (node) {
            node.style.display = 'none';
        }
	}
}