Untitled

<!DOCTYPE html>
 <html>
 <head>
 <title>Page Title</title>
 </head>
 <body>
      <form>
      First name:<br>
      <input type="text" id = "text" name="firstname">
      </form>
     <button type="button" id ="Submit">Submit!</button>

 </body>
 <script>
 document.getElementById("Submit").onclick = function(){
 var a = "'a', 'b', 'c'";
 var enter = document.getElementById("text").value;
 a.toString();
 if (a == enter){
    alert("congrats");
     }
  else if(enter == null){
      alert("you put nothing");
   }
  else if (enter != a){
      alert("wrong try again")
   }
  else{
      alert("End of if statment")

  }

  }
  </script>
  </html>