Disable f5 button and Right click in IE using Javascript

Java Script:

<script type="text/javascript">

var message="";

function clickIE()

 

{if (document.all)

{(message);return false;}}

 

function clickNS(e) {

if

(document.layers||(document.getElementById&&!document.all))

{

if (e.which==2||e.which==3) {(message);return false;}}}

if (document.layers)

{document.captureEvents(Event.MOUSEDOWN);document.  onmousedown=clickNS;}

else

{document.onmouseup=clickNS;document.oncontextmenu  =clickIE;}

 

document.oncontextmenu=new Function("return false")

window.history.forward(1);

document.attachEvent("onkeydown", my_onkeydown_handler);

function my_onkeydown_handler() {

    switch (event.keyCode) {

        case 116 : // 'F5'

            event.returnValue = false;

            event.keyCode = 0;

            window.status = "We have disabled F5";

            break;

    }

}

</script>