<script>

   //------ Raveshe Aval

   var users = prompt("Who's there ?");

   if (users == "Admin") {

    pass = prompt("Password");

    if (pass == "TheMaster") {

     alert("Welcom");

    } else {

     alert("wrong password");

    }

   } else {

    alert("I don't know you");

   }

   //-------- Raveshe 2

   var users = prompt("Who's there ?");

   users == "Admin"

    ? (pass = prompt("Password"))

    : alert("I don't know you");

   pass == "TheMaster" ? alert("Welcom") : alert("wrong password");

//--------- Raveshe 3

      var user = prompt("Who's there ?");

      switch (true) {

        case user == "Admin":

          pass = prompt("Password") ;

          pass == "TheMaster" ? alert("Welcom") : alert("wrong password") ;

          break;

        default: alert("I don't know you")

          break;

      }

  script>