Ztree 展開某節點下的所有的子節點

var id=$("#flag").val(); //背景傳回來的id

  var ids = id.split(",");

  alert(id+"@"+ids+"#"+ids.length);

  for(var i=0; i<ids.length; i++) {

  var node = tree.getNodeByParam("id", ids[i]);

  if("${checked}" == "true"){

  try{tree.checkNode(node, true, true);}catch(e){}

  tree.selectNode(node, false);

  }else{

  tree.selectNode(node, true);

  }

  }