How to disable right click menu in html? : <p>How can I disable the right click menu in html?</p>

<p>Please don't say its unprofessional, I am developing a public touch screen display for a museum.</p>

<p>I have already disabled text selection but if you touch and hold it brings the right click menu- very unprofessional :D </p>

<p>Thanks in advance.</p>
