fig4.8 : Box model demo
fig4.9 : Box model demo 2
fig4.10 : Box model demo 3
fig4.11 : Box model demo 4
fig4.12 : Expanding block level elements
fig4.13 : Expanding block level elements 2
fig4.14 : Expanding block level elements 3
fig4.15 : Float demo
fig4.16 : Float demo 2
fig4.17 : Float and clear demo [3]
fig4.18 : Float and clear demo [4]