<script type="text/javascript">
            var userAge = Number(prompt("How old are you?"));
            function userPrivs(){
              if (userAge < 0){
                alert("What?!");
              }else if (userAge < 5) {
                alert("You don't get any privilages yet!");
              } else if (userAge >= 18 && userAge < 21) {
                alert("You can vote!");
              } else if (userAge >= 21 && userAge < 55) {
                alert("You can drink!");
              } else if (userAge >= 55) {
                alert("You can get healthcare!");
              }
            }
            userPrivs();
          </script>