Javascript 如何在springy.js中选择节点

javascript noob。我正在潜入并设法用这个库设置了一个强制布局图。但是，我不知道如何选择节点（我想进行onclick并触发一些ajax）。使用下面的代码（在我的html中），我不断得到图形未定义的错误

javascript

var graphJSON = {"nodes":["1","2","3","4","5","6"],"edges":[["4","3"],["3","4"],["3","3"],["4","4"]]};
jQuery(function(){
  var graph = new Springy.Graph();
  graph.loadJSON(graphJSON);
  var springy = jQuery('#springydemo').springy({
    graph: graph
  });
});

jQuery('#springydemo').springy({ graph: graph, nodeSelected: function(node) {
    alert(node.data.label);
} });

html:

---

这是我的

等一下。将所有内容包装在jquery中。它应该是这样的：

var graphJSON = {"nodes":["1","2","3","4","5","6"],"edges":[["4","3"],["3","4"],["3","3"],["4","4"]]};



  var graph = new Springy.Graph();
  graph.loadJSON(graphJSON);
  var springy = jQuery('#springydemo').springy({graph: graph});


jQuery('#springydemo').springy({ graph: graph, nodeSelected: function(node) {
    alert(node.data.label);
} });

var graphJSON = {"nodes":["1","2","3","4","5","6"],"edges":[["4","3"],["3","4"],["3","3"],["4","4"]]};



  var graph = new Springy.Graph();
  graph.loadJSON(graphJSON);
  var springy = jQuery('#springydemo').springy({graph: graph});


jQuery('#springydemo').springy({ graph: graph, nodeSelected: function(node) {
    alert(node.data.label);
} });