#clear { position: absolute; left: 256px; right: 0px; height: 16px; padding-left: 2px; background: rgb(224, 224, 224); } #log { position: absolute; left: 256px; top: 16px; right: 0; bottom: 0; background: rgb(255, 255, 255); overflow-y: auto; } #target { position: absolute; left: 0; top: 0; bottom: 0; width: 256px; padding-left: 2px; background: rgb(192, 192, 192); }