add browse buttons in addition to texboxes for html upload

Add two "file upload" buttons (BROWSE) so that users can directly upload texts files with the gene list without cutting and pasting. The problem I am having: -how to get the site to 'choose' to use only one source of data when it is uploaded via the text boxes or the file upload? -how to deal with the fact that the CGI variable type is different depending on whether the uploaded item is a text list or a file. It seems to me the file may have to be opened first and the contents put into $pop_genes for the script to work. This still leaves the question of how to ignore the textbox input however... Below are the relevant lines from the site: HTML Page <form method="post" action="[login to view URL]" ENCTYPE="multipart/form-data"> <textarea name="pop_genes" rows="10" cols="85"> </textarea> CGI-SCRIPT my $pop_genes = $query->param("pop_genes"); ... open(NFF, ">$scratch_dir/pop_genes.$$"); print NFF $pop_genes; close(NFF); I am looking for a simple and elegant solution that does not involve any extra software, paradigms, frameworks or other fancy add-ons. Just a simple and straightforward solution in perl or javascript. The relevant HTML and CGI files are available here: 1 - The most straightforward and simple fix will win the bid. 2 - The page must work with most browsers and OS's ## Deliverables The cgi script and the html form involved are provided in a zipped archive. The perl application itself that receives the arguments is also provided for reference as well as documentation about it. A previous version of the application website is here: [login to view URL] The current website that needs work is here: [login to view URL]