Strange problem with load() and iframe (dojo)

I have I really big problem in this website http://emprego.xtreemhost.com/log/emprego.php

To see the problem you need to click on register (green button) and open the Firefox (I tested in Firefox 4).

If I do the same in chrome none scroll is created, 开发者_JAVA技巧but in Firefox, the registration page has a frame in the bottom of the page - is created a horizontal scroll. I want to avoid the scroll and overflow: hidden is bad practice in this case.

Any ideas? I can't understand what is happening.

cause of the problem: var anim1b = new dojox.charting.action2d.Tooltip(chart1, "default");

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in response to my question

i need to import the themes in the principal file that made the load()

solved