Description
Hi guys,

Explanation & Answer

The easiest way to get user input is with javascript. In fact, javascript was developed for the use with online forms. Once all the text fields are filled and the submit button pressed then the javascript function checks that all the input is reasonable before sending the information to the server. Here's a link to w3 schools which is a great place to learn about javascript. Don't pay for this answer, it's not worth 5 bucks. Consider it a 'welcome to likeplum' gift.
http://w3schools.com/
