.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: #e51329;
}
#cost_btn{
	position: relative;
}
#cost_btn img{
	position: absolute;
	width: 8px;
	height: 12px;
	top: 15px;
	
}