[jQuery] Firefox, Opera.. GOOOD!.... IE... Chrome... BAAD. Initiating a download from a listbox.

[jQuery] Firefox, Opera.. GOOOD!.... IE... Chrome... BAAD. Initiating a download from a listbox.


hi
I have a php script that initiates a download. This occurs when I
file is selected from a drop down box and the js/jquery redirects
them.
Is there a reason this works perfectly in FF and Opera and has no
response in Chrome/IE ?
I tested the download code to execute when the page is loaded rather
than when its selected from the box and it works fine, so I;m guessing
its a problem with the js.
Suggestions?