Dynamic content using checkbox without submit button

Dear friends,

Currently, I am doing Perl project with Javascript.

Now, I have one problem.

I need to create the following dynamic content based on the checkbox selected.

checkbox 1 checkbox 2 checkbox 3
dynamic content

The content will be automatically changed if the user choose different checkbox. The dymanic content should not be displayed in the form. The content will be changed without to click the submit button.

Can anyone have an idea how to do this? Please advice. Thanks.