dhtmlxTree问题 请明白的帮个忙

Question

我调用tree=new dhtmlXTreeObject("treeboxbox_tree","100%","100%",0);
tree.setImagePath("../imgs/");
tree.loadXML("tree3.xml");tree.insertNewItem(1,100,"New Node 1",0,0,0,0,"SELECT");的时候不能自动执行 必须在前面加个alert(); 我点了提示框才会添加

Answer 1

调这个的时候 tree.insertNewItem(1,100,"New Node 1",0,0,0,0,"SELECT");
就是dhtmlxtree 例子 treeEx12.html 中 被注释掉的部分