Alright this seems simple if i understand what you mean....
CSS=Design of the Webpage
JavaScript and JQuery= Alerts and Actions in a Webpage
You can actually add CSS, Javascript, JQuery... into your Html Page using the following tags :
For Javascript and JQuery:
Code:
<script>JS/JQ codes go in here</script>
as you can see we add the "<Script></Script>" tags before and after the Javascript/JQuery code
For CSS
Code:
<style>CSS codes go here</script>
as you can see we add the "<Style></Style>" tags before and after the CSS code
You can also
Link them to your html page (in order to keep everything organized: 1page for all html, 1page for all JS, 1 page for all JQ, 1 page for all CSS...)
Code:
<a href="locationofyourfile.typeoffile"></a>
Example:
Code:
<a href="style.css"></a>
That way your computer automatically knows were to look and all the style and actions are applied to your page!
Good Luck!