.commoditylistnav{ width: 100%; height: 45px; background: white; } .nav_block{ width: 25%; float: left; height: 45px; line-height: 45px; text-align: center; color:#525252; font-size: 12px; } .commoditylistnav .on{ color: #ff9300; } #cost_btn{ position: relative; } #cost_btn img{ position: absolute; width: 8px; height: 12px; top: 15px; }