.bg_h50w100{background-repeat:no-repeat;background-size:100%;content:"";display:block;height:50px;width:100px}.bg_h100w100{background-repeat:no-repeat;background-size:100%;content:"";display:block;height:100px;width:100px}.h120w120{height:120px;width:120px}.overflow{overflow-x:auto}