I am using Bootstrap 3.3.2 but it can not run well on IE7,8 so I need to downgrade it to version 2. How can I do that?
Thanks a ton.
Well, go download the necessary files for version 2 (using http://getbootstrap.com/2.3.2/ is likely going to be quite helpful) and set your site up to use those in place of the 3.x assets. This is a major-version change, so there's going to be breaking functionality all over the place. Things changed a lot from 2.x to 3.x, so you're going to have to make a lot of syntactic changes in your code to match the 2.x docs. There isn't a "downgrading" guide published, but the log at https://github.com/twbs/bootstrap/releases may help you.