JavaScript屏蔽右键F12和Ctrl+U等绝大部分按键

<script type="text/javascript">
  //屏蔽右键菜单
  document.oncontextmenu = function (event) {
    if (window.event) {
      event = window.event;
    }
    try {
      var the = event.srcElement;
      if (
        !(
          (the.tagName == "INPUT" && the.type.toLowerCase() == "text") ||
          the.tagName == "TEXTAREA"
        )
      ) {
        return false;
      }
      return true;
    } catch (e) {
      return false;
    }
  };
  //屏蔽粘贴
  document.onpaste = function (event) {
    if (window.event) {
      event = window.event;
    }
    try {
      var the = event.srcElement;
      if (
        !(
          (the.tagName == "INPUT" && the.type.toLowerCase() == "text") ||
          the.tagName == "TEXTAREA"
        )
      ) {
        return false;
      }
      return true;
    } catch (e) {
      return false;
    }
  };
  //屏蔽复制

  //屏蔽剪切
  document.oncut = function (event) {
    if (window.event) {
      event = window.event;
    }
    try {
      var the = event.srcElement;
      if (
        !(
          (the.tagName == "INPUT" && the.type.toLowerCase() == "text") ||
          the.tagName == "TEXTAREA"
        )
      ) {
        return false;
      }
      return true;
    } catch (e) {
      return false;
    }
  };
  //禁止f12

  function fuckyou() {
    window.close(); //关闭当前窗口(防抽)
    window.location = "about:blank"; //将当前窗口跳转置空白页
  }
  //禁止Ctrl+U
  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) {
        e.preventDefault();
      }
      if (arr.indexOf(keyCode) > -1) {
        e.preventDefault();
      }
    });

  function ck() {
    console.profile();
    console.profileEnd();
    //我们判断一下profiles里面有没有东西，如果有，肯定有人按F12了，没错！！
    if (console.clear) {
      console.clear();
    }
    if (typeof console.profiles == "object") {
      return console.profiles.length > 0;
    }
  }

  function hehe() {
    if (
      (window.console &&
        (console.firebug ||
          (console.table && /firebug/i.test(console.table())))) ||
      (typeof opera == "object" &&
        typeof opera.postError == "function" &&
        console.profile.length > 0)
    ) {
      fuckyou();
    }
    if (typeof console.profiles == "object" && console.profiles.length > 0) {
      fuckyou();
    }
  }
  hehe();
  window.onresize = function () {
    if (window.outerHeight - window.innerHeight > 200)
      //判断当前窗口内页高度和窗口高度，如果差值大于200，那么呵呵
      fuckyou();
  };

  document.onkeydown = function (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
      return false;
    }
  };
  window.onhelp = function () {
    return false;
  };
</script>