Web designing Sequence..
HTML,CSS,JS won't help you for server database or database so learn at least one RDBMS (Relational Database Management System). Suppose a website has been built and you don't have any idea to play with user data then you will have to need of any one like PHP,MySQL, ASP.net etc..
At least (All below) HTML CSS JS PHP
Dear Andile, as I have checked your profile you are learning JS and Java at same time (Please ignore learning Java with JS)
One of them or all them?