function Window.onhelp () {return false}//masking F1 Help
Document.onkeydown = function () {
if (window.event && window.event.keyCode = = 113) {
Window.event.keyCode = 505;
}
if (window.event && window.event.keyCode = = 114) {
Window.event.keyCode = 505;
}
if (window.event && window.event.keyCode = = 115) {
Window.event.keyCode = 505;
}
if (window.event && window.event.keyCode = = 116) {
Window.event.keyCode = 505;
}
if (window.event && window.event.keyCode = = 117) {
Window.event.keyCode = 505;
}
if (window.event && window.event.keyCode = = 118) {
Window.event.keyCode = 505;
}
if (window.event && window.event.keyCode = = 119) {
Window.event.keyCode = 505;
}
if (window.event && window.event.keyCode = = 120) {
Window.event.keyCode = 505;
}
if (window.event && window.event.keyCode = = 121) {
Window.event.keyCode = 505;
}
if (window.event && window.event.keyCode = = 122) {
Window.event.keyCode = 505;
}
if (window.event && window.event.keyCode = = 123) {
Alert ("F12 is disabled");
event.keycode=0;
Event.returnvalue=false;
}
if (window.event && window.event.keyCode = = 13) {
Window.event.keyCode = 505;
}
if (window.event && window.event.keyCode = = 8) {
Alert (str+ "\ n Please use the DEL key to delete the characters!) ");
Window.event.returnvalue=false;
}
if (window.event && window.event.keyCode = = 505) {
Alert (str)
Window.event.returnvalue=false;
}
}
Document.onmousedown=function (oevent) {
if (window.event)
Oevent=window.event;
if (oevent.button==2)
Alert ("right mouse button is not available");
if (oevent.button==1)
Alert ("Left mouse button unavailable");
}
right mouse button disabled there is a way
<script type= "text/javascript" >document.oncontextmenu = function (e) {return false;} </script>
JS screen function key f1~12 and right mouse button and left mouse button