通过使用JavaScript屏蔽最常用的四种查看网站源码方法：

 <!DOCTYPE html>
  <html>
  <head>
      <meta charset="utf-8">
      <title>JS禁止查看网页源代码的简单实现方法</title>
  </head>
  <body>
      <script type="text/javascript">
          window.onload = function(){
             //屏蔽键盘事件
             document.onkeydown = function (){
                 var e = window.event || arguments[];
                 //F
                 if(e.keyCode == ){
                     return false;
                 //Ctrl+Shift+I
                 }else if((e.ctrlKey) && (e.shiftKey) && (e.keyCode == )){
                     return false;
                 //Shift+F
                 }else if((e.shiftKey) && (e.keyCode == )){
                     return false;
                 //Ctrl+U
                 }else if((e.ctrlKey) && (e.keyCode == )){
                     return false;
                 }
             };
             //屏蔽鼠标右键
             document.oncontextmenu = function (){
                 return false;
             }
         }
     </script>
 </body>
 </html>

<script>
          document.oncontextmenu = function () { 
                return false; };
             document.onkeydown = function () {
            if (window.event && window.event.keyCode == 123) {
                event.keyCode = 0;
                event.returnValue = false;
                return false;
            }
            };
         /** 全局事件监听*/
    document.body.onkeydown  = function(e){
                   var keyCode = e.keyCode || e.which || e.charCode;
                    var ctrlKey = e.ctrlKey || e.metaKey;
                    if(ctrlKey && (keyCode == 83 || keyCode == 85 || keyCode == 73)) {
                        e.preventDefault();
                        return false;
                    }
                    else if(ctrlKey && (keyCode == 83 || keyCode == 85 || keyCode == 67)) {
                        e.preventDefault();
                        return false;                    
                    }else if(keyCode && keyCode == 123){
                        return false;
                    }
               }
    </script>

单独禁止右键+F12

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