url relative path ../ not works for cross domain link import

[zhangzhimin]

I make a website a.mydomain.com, I import header.html polymer element from b.mydomain.com/public/ui.
In the header.html I import d3.js by relative path include ../components/d3/d3.js , but it not works, I get "b.mydomain.com/public/ui/components/d3/d3.js" instead of expected "b.mydomain.com/public/components/d3/d3.js", so the relative path "../" not work.
in fact, "./" and the absolute path works well,
only "../" not works in cross domain get.

[zhangzhimin]

../../ not work， but ../ work well， my faults