前台:

 

     <input >).combotree({
            required: true
        }).combotree("tree").tree({
            url: 'tree.ashx?id=0&state=closed',
            checkbox: false,
            onBeforeExpand: function (node, param) {
                $(this).tree('options').url = "tree.ashx?state=open&> node.id;
            }
        });    

 </script>

 

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