Upload Iframe ajax

Hi ;

i want to use iframe and ajax in my form but it seems really
complicated . Because :

- What happens if user uploads a file and does not submit the
form the file will be uploaded
- How can I use an ajax progress bar in cake ? Not swf upload
please I sdont want flash in my site .
- how can I pass data from form to the iframe because I will need
to record the file path to the database where they belong ?

has anyone solved any ofthese issues ?
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