var opt0 = ["一级分类|0", "二级分类|0", "三级分类|0"];
var dsy = new Dsy();
dsy.add("0", ["外语语言|1"]);
dsy.add("0_0", ["小语种|21","日语韩语|22"]);
dsy.add("0_0_0", ["德语|111","日语|1266"]);
dsy.add("0_0_1", ["日语|117"]);