Merge two simple static html pages into one

Hello, it's a simple work. I think it takes 15 minutes if you know how to deal with css/js. We need to merge a part of an html static page into our main html static page. Both pages are bootstrap based. Every page has his own css/js dependencies. For example both pages have their own [login to view URL] stylesheet. I tryed to merge them but they obviously conflict. We need to filter the classes of the second css/js to work with the first. You can keep separate the css and the js but they have not to conflict and every part of the page has to work properly (slider, dropdown...) I think no need to write new classes. It's only a work of filter and merge properly.