Many a times, providing the alert message and disabling the right click of the mouse does not help because three attempts of clicking on the right click of the mouse once again enables the right click. Disable text selection, cut, copy, right click on a page. If the op had said so users cant download the image after answering go on to tell them why its not a complete solution. In this tutorial shows how to disable right click in a pdf file opened in the iframe or tag. If the op had said so users cant download the image after answering go on to tell them why its not a complete.