Be fast please its an rich internet application course

A customer wants to sum up all the numbers inside a string. Write the source code of an HTML page that accepts the text(string) by a form element and then displays the grand total on the page via using a div (To calculate and display the grand total use JavaScript).

Sample:

if the input text is: There were 40 chickens, 5 cows, and 15 horses in the farm.

The output should be: 60

Hint: Think about split function or regular expressions.