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", ["雅思托福|19"]);
dsy.add("0_0_0", ["雅思|101","托福|102","SAT|103","GRE|104","GMAT|105"]);