3. AJAX cascading menu, very easy to use, realize asynchronous submission! AJAX的级联菜单，非常好用，实现异步提交！
英英解释
n.
1. something (manuscripts or architectural plans and models or estimates or works of art of all genres
2. the act of submitting; usually surrendering power to another
3. the condition of having submitted to control by someone or something else
4. the feeling of patient submissive humbleness
5. a legal document summarizing an agreement between parties in a dispute to abide by the decision of a
6. an agreement between parties in a dispute to abide by the decision of an arbiter
7. (law) a contention presented by a lawyer to a judge or jury as part of the case he is arguing
