modal

[zooeyking]

当modal显示的状态下，点击浏览器back按钮，modal不会消失，之后modal的 关闭操作按钮也不再起作用了。
英文不好不太会写英文，
when the modal is visual , click the back button of browser , the modal can't disapper .
and then the close button of modal can't work.
can U help me?