JS禁用复制、反键、F12

禁用浏览器反键功能

document.oncontextmenu = new Function("event.returnValue=false;");

禁用浏览器选择文字功能

document.onselectstart = new Function("event.returnValue=false;");

禁用F12

document.onkeydown = function () {
    if (window.event && window.event.keyCode == 123) {
        event.keyCode = 0;
        event.returnValue = false;
        return false;
    }
};