What? Make a mistake entering data? Who me? NO WAY! Right…
Every form of data input by a user should be validated in some form or fashion. If you get
clean data in,
you won’t get garbage out. This tutorial is going to explain how to validate
numerical data entered into a form using JavaScript.
First, let us begin with the code to insert the JavaScript into your HTML document.
Place these lines between the and tags.
This line tells the web browser to expect some JavaScript code and signal the beginning of
the script:
So now the format should look something like this: