Question

Suppose I have input[type=file] element and I want to intercept onclick event and prevent file dialog from appearing if conditions are not met. Is it possible? And why, if – not?

Answer 1

Soufiane’s code requires that you have a Javascript library called jQuery on your page. If you don’t have it, you can get it at http://www.jquery.com or use something in plain Javascript:

HTML

<input type="file" id="openf" />

JS:

document.getElementById('openf').onclick = function (e) { e.preventDefault(); };