Question: > 
> **Possible Duplicate:**  
> 
> [How can I upload files asynchronously with JQuery?](https://stackoverflow.com/questions/166221/how-can-i-upload-files-asynchronously-with-jquery) 
> 
> 
> 

I have a file upload field, after the image was selected, I make a jquery ajax post to an aspx page's page method. My question is, how can I pass that image via jquery? When I do `$(this).val()` it only gets the file name. I want to pass the image object itself.

Answer: 
The cookie should be deleted, because you set his lifetime to 0.

Maybe there is still a firefox-process running, take a look into the taskmanager.
[Look here](http://www.php.net/manual/en/session.configuration.php#ini.session.cookie-lifetime). 

"The expiration timestamp is set relative to the server time, which is not necessarily the same as the time in the client's browser."

Could be that... dunno.