Fully doezn't works at FF 3.5, 3.6

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Use firefox 3.5
2. or use firefox 3.6
3.

What is the expected output? What do you see instead?
- datepicker-widget fully doezn't works.

What version of the product are you using? On what operating system?
I am using Firefox 3.6.8 on WindowsXP

Please provide any additional information below.

datepicker-widget fully donezn't works but only on a Firefox starting with 3.5. 
Especially for this situation I started to test all versions of FF: 1.x, 2.0, 
3.0, 3.5 and 3.6, also I checked Google Chome. Problem was only in FF 3.5 & 
3.6. I started to investigate situation and found, that in a FF 3.5 developers 
changed somethng related to this situation. See 
https://developer.mozilla.org/En/Firefox_3.5_for_developers and 
https://developer.mozilla.org/En/New_in_JavaScript_1.8.1 and 
https://developer.mozilla.org/En/Core_JavaScript_1.5_Reference/Global_Objects/Ob
ject/GetPrototypeOf and http://ejohn.org/blog/objectgetprototypeof/#postcomment
I am not a programmer and I cannot understand all exactly, maybe I am wrong. 
But dependence between my problem and firefox versions 3.5 & 3.6 was exactly!

Original issue reported on code.google.com by [email protected] on 19 Aug 2010 at 11:39