// close on mouse out
hs.Expander.prototype.onMouseOut = function (sender) {
   sender.close();
};
 hs.outlineType = 'rounded-white';
 
// close if mouse is not over on expand (using the internal mouseIsOver property)
hs.Expander.prototype.onAfterExpand = function (sender) {
   if (!sender.mouseIsOver) sender.close();
};