“加载失败” when touch the same item on navigation bar twice

[MiloJiang]

Precondition
*Open firefox 26.0 on ubuntu 12.04-64bit
*Open http://mixteam.github.io/mixdoc/index.html and stay for idle
Steps
1. Touch/click "平台Platform” and wait for idle.
2. Then "大事记" --> "Mix网站低调上线 mix"
3. Touch/click "平台Platform” again
Actual
Back to platform page
Expectation
"加载失败“ popup
Always
Yes
Notes
Other items in navigation bar have the same issue. Such as "工具Mix tool" etc.