write a program in javascript to find out the grades.

The MarkToGrad function scrapes the student mark out of the mark-input-box element and verifies it is realistic. A Mark must be number only, nonnegative, and less than 101. If an invalid mark is entered, it displays a message back to the user in the .validation-message element. Messages should be informative... return as many different messages as you can to guide the user what kind of erroneous value has entered If the user entered any value above 90 Grade A should be displayed as a result If user entered any value above 80 Grade B should be displayed If user entered any value above 70 Grade C should be displayed If user entered any value above 50 Grade D should be displayed If user entered any value less than 50 Grade F should be displayed Hint 1: In JavaScript, we can use the global parseInt function to try and convert a string to a number. Hint 2: Use exception handling. Hint 3: Use HTML and JavaScript