Things to Know How to load web sites with pictures onto the server. Know how to make tables inside of tables and colspan and rowspan. The difference between png and jpg pictures. Absolute vs relative URLs. What is a URL. How to make an imagemap. Don't forget the #. What is a kilobyte and a megabyte and a byte. CSS Things To Know There are three places to put CSS content. At the top, in a seperate file, and style= Remember that in CSS it's not = it's :. Never WIDTH=3, always WIDTH:3 Know CSS layers with keft: and top: Know how to look things up .. there are too many to remember. Javascript Things To Know Events like onchange Code like if, else. Conditions like a < 10 && a > 20 || a == 4. Remember, it's not = it's == Remember && is and, || is or document.getElementById("thing").value ... don't forget the .value Assignment uses = and not ==. document.getElementById("answer").value = "Bad data" Form Things to Know Put a name on almost any input field.