How to set the easyui-tree onDblClick expand and close the node?

[frankgao]

I need set the onDblClick expand and close the node.
How to do it? 
Thanks.

[stworthy]

Please try this code:

Code:

$('#tt').tree({
  onDblClick: function(node){
    if (node.state == 'closed'){
      $(this).tree('expand', node.target);
    } else {
      $(this).tree('collapse', node.target);
    }
  }
})