Please put this in --> JavaScript I need help . Need an example on how to do this thank you

Math Calculations

UI: button for starting processing, prompt input boxes, 1 or more labels for output

INPUT: numbers

PROCESSING: calculate the sum, average, high and low of the numbers inputted; when user enters CRLF stop requesting input and output the four required values

OUTPUT: sum, average, high and low **also include a link back to the original page at the bottom of the output

When I put this in my code . I doesn't want to get out sum average high and low numbers . In some internet browser it just wants to say on entering the numbers and doesn't want to do the next task . Or It was goes to sum, average high low but it outputs a different thing then it should .