//禁止右键
document.oncontextmenu = function () {
return false
}
//禁止f12
document.onkeydown = function(e){
var even= e || window.event；
var k = even.keyCode || even.which|| even.charCode
if(k == 123){
window.event.cancelBubble = false
window.event.returnValue = false
}
}
//禁止复制
<body oncopy = "noCopy()"></body>
function noCopy(){
event.returnValue = false;
}