what's the problem for the infowindow with tabcontainer?

[baohuachu3]

Hi all,

   I have tried the code as the link:

Info window with chart | ArcGIS API for JavaScript 3.18 

In my sample page it works fine. After merged in my project it has the problem, the infowindow is as below. 

I can't identify what cause the problem? This issue obsess me one week. 

[FC_Basson]

It could be due to conflicting CSS rules.