"Invalid argument" Error in IE ??

[PHPycho]

I getting a error like "Invalid argument" in IE while its working perfectly in FF. and the form gets automatically submitted.
I would like to know what are the factors responsible for generating errors like "Invalid argument" in IE so that we are aware while scripting JS.
Thanks in advance for your valueable suggestions.

[thetestingsite]

Um, we need to see the code and/or a link to your problem site in order to really be of any help.