The below JavaScript code will open an alert window to display a message when the user entered a number, if the user entered number like 65, an alert window will display a message like?                                    
            function showMessage ()  {
         var  number=parseFloat (document.getElementById(‘numberBox’).value); //number=65
                     if (number < 50 )
                      {  
                           alert (‘Jeff’) ;
                      }
                    
                     else
                     { 
                                 If  ( number < 70 )
                                   { alert (‘Bob’) ;}
                                else
                                   {     alert (‘Lewis’);     }
                    }
}//close function