点击登录按钮，弹出登录对话框

[{"title":"（ 4 个子文件 30KB ） 点击登录按钮，弹出登录对话框","children":[{"title":"www.youtiy.com","children":[{"title":"css","children":[{"title":"youtiy.css <span style='color:#111;'> 7.04KB </span>","children":null,"spread":false}],"spread":true},{"title":"index.html <span style='color:#111;'> 1.71KB </span>","children":null,"spread":false},{"title":"js","children":[{"title":"jquery.min.js <span style='color:#111;'> 40.24KB </span>","children":null,"spread":false}],"spread":true},{"title":"说明.html <span style='color:#111;'> 3.16KB </span>","children":null,"spread":false}],"spread":true}],"spread":true}]