to overwrite or not to overwrite

[concept0020]

I have an upload script which works fine, but what I am looking to do now is to have the script first check to see if the file exists... I know i could either check the name against the database or use the is_file() function.

What I want to do is if the file exists then require the user to either overwrite the file or change the name of the file...

I am not sure how to go about this... I know with javaScript i could use alert boxes to direct to php...

Or have php open a new window... then overwrite or change...

Any thoughts....

Thanks,

[planetsim]

if (file_exists($filename)) {
  //rename it
} else {
  //doesnt matter if its renamed or not the file name doesnt exist
}