Disable Right Click Button - Javascript

while developing web application ,some situation arises where we have to disable right click button of a mouse in web pages of Asp.Net,PHP ,JSP. you can achieve this by using Javascript.

Qusetion - How to disable right click button of mouse in webpage.

Solution- 
add below script in head section of web page

<script type="text/javascript">
        var msg = "This function is disabled!";
        var bV = parseInt(navigator.appVersion)

        var bNS = navigator.appName == "Netscape"

        var bIE = navigator.appName == "Microsoft Internet Explorer"

 
        function nrc(e) {
            if (bNS && e.which > 1) {
                alert(msg)
                return false
            } else if (bIE && (event.button > 1)) {
                alert(msg)
                return false;
            }
        }
 
        document.onmousedown = nrc;
        if (document.layers) window.captureEvents(Event.MOUSEDOWN);
        if (bNS && bV < 5) window.onmousedown = nrc;
    </script>

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