[TYPO3] Different HTML templates depending on optional right column

[Rickard Andersson]

Howdy,

I'm trying to setup my TypoScript to use different HTML templates
depending on whether the page has any content in the right column or
not. In essense, what I want is to use 2col.html if the page has
anything in the right column and 1col.html if it doesn't. I found
something relating to this at typo3wizard.com, but I can't make any
sense out of it:

http://www.typo3wizard.com/en/content-comments.html?no_cache=1&tx_rfcontentcomments_pi1%5Bcontentuid%5D=293

Here's a shortened version of what I have today:

temp.mainTemplate = TEMPLATE
temp.mainTemplate {
 template = FILE
 template.file = fileadmin/template/2col.html

 marks.HEADER_1 = TEXT
 marks.HEADER_1.field = title
 marks.MAIN_CONTENTS = TEXT
 marks.MAIN_CONTENTS < styles.content.get
 marks.RIGHT_CONTENTS = TEXT
 marks.RIGHT_CONTENTS < styles.content.getRight
}

Can anyone instruct me how to adapt this to load 1col.html in case
styles.content.getRight is empty?

Cheers,
Rickard