There are three basic to building of the web page, HTML/XHTML, CSS and JavaScript. HTML/XHTML as the core / main language to build a web page. CSS ( Cascading Style Sheet ), we used to adding style to our web pages and allowing we to lay them out in a way that is not only attractive but also adds visual impact. JavaScript is the third corner, allowing pages to do more than just be static documents.
… continue reading : Basic Learning JavaScript.