gistfile1.txt

    <script>
         var n= prompt('Please enter the value','');
         var i=1;
  document.write(n);
  document.write(" For ");
    while(n != 1)
    {
        if(n % 2 == 0)
        {
            n=n/2;
        }
             else
        {
            n = (3*n)+1;
        }
        i++;

         }

        document.write(i)
        </script>

This implementation is not fully correct!