Sorry, I have to chime in because TeenScripts’ advice isn’t entirely correct.
Trones, in your current HTML files look for the document header (enclosed by
</head> tags). In there you will usually find the references to all stylesheets and scripts. As TeenScripts wrote styles can be linked but these links look something like this:
<link rel="stylesheet" type="text/css" href="styles.css" media="screen">. The stuff in the href attribute is the path to the CSS file. If you change that to your custom CSS file the document will take these styles. You can also just add a new
<link> element if you wanna add new styles while keeping the old ones.
Now, when I hear “slider” I think of some kind of JS framework so there is probably more to it than just adding the new slider or just replacing the old references with the new ones. The best would be to show us your code so someone can explain you what extactly you have to replace and what should stay.
Donít click this link!