Could you post your message in English please?
When uploading a file with iexplorer this error throws me js implemented. This error occurs only see.
The site uses RichFaces 3.0.
Too much to the help I can provide
1) Could you try the same with RF 3.3.3?
2) Is it ok with all the other browsers?
3) I think I can't help you if it's RF+IE8.0 bug. Please, wait for RF developers' answer if 3.3.3 will not help you.