I am setting up a customization page. The page has options with checkboxes. There is a submit button which processes the options. This all works fine. The issue: When the user clicks on one of the options, I want it to be a link to a set of sub-options. These sub-options also have checkboxes and a submit button. This submit button will take the user back to the main options page. When the user goes back to the main options page, I would like the options checkboxes to remember which ones were checked before the user went to the sub-options.
When the user clicks on the link "Option3", they will go to a page which has:
When they hit submit, they go back to the main option page.
How can I keep the options around? How can I let the options page know about the sub-options which have been selected?