Enter the tip.html text from Figure 5.11 into a new Web page, then load the page in the browser to verify that it behaves as described.

Modify your page so that it contains a second text box, where the user can enter the tip percentage. For example, if the user entered 15 in the percentage box, the page would produce the same calculations as in Figure 5.12. If the user entered 20 in the percentage box, however, the tip amount would be 20% of the check amount?