javascript click function not working on IE

[George2]

Hello everyone,

I am implementing a star-click function, I borrowed most part of code and similar to this online sample,

http://nofunc.org/AJAX_Star_Rating/

Here is my code (download link below), and the problem is the last star not working (when I use mouse to click on the last star, no effect), any ideas what is the problem?

Source code download link, http://www.mediafire.com/file/5knvc6w7f3va8ef/Src.zip

Here is more detailed description about my problem with screen snapshots,

http://www.mediafire.com/?728md8bex2bozqz

http://www.mediafire.com/?8a1p65fsk8j653k

Here is the star image (stars.gif) which my code refers

http://i56.tinypic.com/1zbquyf.gif

thanks in advance,
George