.col-xs-15,
.col-sm-15,
.col-md-15,
.col-lg-15 {
    position: relative;
    min-height: 1px;
    padding-right: 10px;
    padding-left: 10px;
}
.col-xs-15 {
    width: 20%;
}
.col-xs-3a{
    	 width:23%
    }
.col-xs-4a{
    	 width:31%
}
@media (max-width: 520px) {
.col-xsb-12{
    width: 100%;
}
.hidden-xsb{
	display:none;
}
}
@media (min-width: 768px) {
.col-sm-15 {
        width: 20%;

    }
    .col-sm-3a{
    	 width:23%
    }
    .col-sm-4a{
    	 width:31%
    }
}

@media (min-width: 992px) {
    .col-md-15 {
        width: 20%;

    }
    .col-md-3a{
    	 width:23%
    }
    .col-md-4a{
    	 width:31%
    }
}

@media (min-width: 1200px) {
    .col-lg-15 {
        width: 20%;

    }
    .col-lg-3a{
    	 width:23%
    }
    .col-lg-4a{
    	 width:31%
    }
}