移动端去除alert域名提示，禁止长按粘贴复制

去除alert域名提示：重写alert

window.alert = function (name) {
    var iframe = document.createElement("IFRAME");
    iframe.style.display = "none";
    iframe.setAttribute("src", 'data:text/plain,');
    document.documentElement.appendChild(iframe);
    window.frames[0].window.alert(name);
    iframe.parentNode.removeChild(iframe);
};

confirm：

window.confirm = function (message) {
    var iframe = document.createElement("IFRAME");
    iframe.style.display = "none";
    iframe.setAttribute("src", 'data:text/plain,');
    document.documentElement.appendChild(iframe);
    var alertFrame = window.frames[0];
    var result = alertFrame.window.confirm(message);
    iframe.parentNode.removeChild(iframe);
    return result;
    };

长按禁用粘贴复制：

* {
    box-sizing: border-box;
    -webkit-touch-callout: none;/*系统默认菜单被禁用*/
    -webkit-user-select: none;/*webkit浏览器*/
    -moz-user-select: none;/*火狐*/
    -ms-user-select: none;/*IE10*/
    user-select: none;
  }

 input , textarea{
    -webkit-user-select:auto;
 }