<script>
       var name = prompt("What is your name?");
       var weight = prompt("what is your weight?");

       function check(name ,weight){
           if (weight> 25) {
               alert (name + "Your weight is " + weight + "which is not normal."+ "Sorry");
           }
           else {
               alert (name + "Your weight is " + weight + "which is normal." + "Welcome");
           }
        return check;
    </script>