Double click goes to flash through modal dialog

[klio123]

hi,
I have problem with my flash site header. It contains link to the homepage, so
when user clicks on header, homepage is opened.

Now, somewhere in the page I have file upload input <input type='file'....>
When I click Browse - File Open dialog is shown. If it is shown over my flash
header and I double click on any file (so that flash is under this file),
dialog is closed with this file selected, but my click is transmitted to flash
and I'm redirected to the homepage.
I can't understand, how not to send this click to header (I tried to set
z-index, but it didnot help). This behaviour is in all browsers in Windows.
:mad;