I want to upload file from client to server in javascript
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You can use a form with an input field of type "file" to post a file to a CGI script, e.g.

<form name="frm" action = "http://etc" METHOD="POST" ENCTYPE="multipart/form-data">

You can activate this like via Javascript like any form:


What you can't do, though, is set or get the value of the filename. The user must do this manually. The reason for this is obvious: it would allow a malicious javascript program to upload any file it wanted.

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