屏蔽浏览器查看源码快捷键

var arr = [123, 17, 18];
document.oncontextmenu = new Function("event.returnValue=false;"),//禁用右键

window.onkeydown = function (e) {
    var keyCode = e.keyCode || e.which || e.charCode;
    var ctrlKey = e.ctrlKey || e.metaKey;
    console.log(keyCode + "--" + keyCode);
    if (ctrlKey && keyCode == 85) {
        console.log("ctrl+u");
        e.preventDefault();
    }
    if (arr.indexOf(keyCode) > -1) {
        console.log("其他");
        e.preventDefault();
    }
    //e.preventDefault();
    //return false;
}