php - HTML-form does not post back anymore after post with content-disposition -

I do not know whether this is a feature of the design or something is wrong.

I have an HTML-form on the webpage, after withdrawing a PDF-document. This document is provided through content-nature. It was thought that the current page operation remains and the user can continue with their work. But PDF document is provided as a download after downloading back, the current page remains in the browser.

Technical order: 1) HTML form - There is no input field to fill in the form.

& gt; Post 2) PHP Request - & gt; Handle the post and distribute PDF documents as a download 3) The page browser stays the same but does not post back now

Whether this behavior has been done by the design or I do something wrong in the PHP script Am I

Well, this problem was my own, a script was loaded on the page, Disables all submitted buttons after disabling.

So there is no strange feature of the bug, but there is a problem of self