摘要：
left, left,left 1 #wrapper { 2 margin-left: 400px; 3 float: left; 4 } 5 #navigation { 6 width: 200px; 7 float: left; 8 margin-left: -100%; 9 }10 #extra {11 width: 200px;12 float: left;13 margin-left: -100%;14 position: relative;15 left: 200px;16 }17 #footer {18 clear: both;19 }... 阅读全文
