HTML DOCTYPE html> Document -- CSS #all { width: 800px; height: 700px; margin-left: auto; margin-right: auto; } #top { background-color: red; width: 800px; height: 100px; } #left { background-color: orange; width: 150px; height: 500px; float: left; } #mid { background-color: yellow; width: 650px; height: 500px; float: left; } #bot { background-color: green; width: 800px; height: 100px; clear: le..