How can I create an uncheck all function for all records in a particular report?

Thank you that worked!

There was a missing $ before DisplayMyProjects, but once added, the formula worked flawlessly.

I never realized you could access a saved table to table import from a URL formula. Thank you! 

Now, is there any good way to display this as a single button rather than 1 button per row? That's why I was thinking  about putting it on some sort of homepage.