like.html

<html>
    <head>
           <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css"></link>

    </head>

    <body>
    <i onclick="like()" class="glyphicon glyphicon-thumbs-up"><span id="likes"></i></span>
    <i onclick="dislike()" class="glyphicon glyphicon-thumbs-down"><span id="dislikes"></i></span>
            
       <script>
                 var likecount=0;
                 var dislikecount=0;


           function like(){
            likecount++;
               console.log(likecount);
               document.getElementById("likes").innerHTML=likecount;
              
           }
           function dislike(){
            dislikecount++;
               console.log(dislikecount);
               document.getElementById("dislikes").innerHTML=dislikecount;
           }
           
       </script>
       </body>

</html>