js 静止f1到f12 和屏蔽鼠标右键

//静止键盘f1-f12
function testKeyDown(event)
{
if ((event.keyCode == 112) || //屏蔽 F1
(event.keyCode == 113) || //屏蔽 F2
(event.keyCode == 114) || //屏蔽 F3
(event.keyCode == 115) || //屏蔽 F4
//(event.keyCode == 116) || //屏蔽 F5
(event.keyCode == 117) || //屏蔽 F6
(event.keyCode == 118) || //屏蔽 F7
(event.keyCode == 119) || //屏蔽 F8
(event.keyCode == 120) || //屏蔽 F9
(event.keyCode == 121) || //屏蔽 F10
(event.keyCode == 122) || //屏蔽 F11
(event.keyCode == 123)) //屏蔽 F12
{
event.keyCode = 0;
event.returnValue = false;
}
}
document.onkeydown = function(){testKeyDown(event);}
window.onhelp = function(){return false;}

//禁止鼠标右击
function stop(){
return false;
}
document.οncοntextmenu=stop;