In the source code of this webpage, http://blog.html.it/layoutgala/LayoutGala02.html div#navigation{float:left;width:25%;margin-left:-25%} div#extra{float:left;width:25%;margin-left:-100%} div#footer{clear:left;width:100%} What does the -25% and -100% mean? Also, in this page http://www.html.net/tutorials/css/lesson13.asp, they have an example of a three column page too. The code looks simpler than the layout gala code. So why would layout gala use a different code than the html.net tutorial?
It's a way to place the orange column aligned to the left. Negative numbers reflect the position in relation to the center column.
One more thing, suppose I'm using the html.net tutorial code, how would I create a new row? Do I just put a <br> after the last </dive>?
Well its not required to make the layout work anyway, you could just float them all left to make it work
In the code: div#content{margin: 0 25%} What does the 0 stands for and why is it 25% even though it looks like it is occupying 50% of the space?