embedded javascript in php

[Anon]

Currently, I have some code like this:

if (is_dir($student_filepath))
{
check_attachment_limit($userfile, $student_filepath);
}
else if ($userfile_size/1024 > 1024)
{
echo "file too large";
delete_all_existing_files($dir);
}

Now, I have to use the alert function in javascript to replace to echo. so, i want to ask:

(1). how can i link from the end of else if statment to the javascript function?
(2). how can i link it back to my php module?

thanks a lot.

kelvin

[dmills]

you can still use echo() to output your javascript:

echo "<script ...>alert("hey!");</script>

or whatever