HTML: HTML 4.0 elements and attributes, fonts and text formating, forms, html eventsCSS: css syntax, class and id selectors, styling elements and backgrounds, display, positioning and layout javascript: string object functions, array object functions, events, conditional constructsAJAX: sending xmlhttp request to fetch data from a php file.PHP: querying mysql database, displaying mysql database data, array functions, string functions, conditional and looping constructs, sessions, GD library. mysql:insert, update, select statements.