.containerContent {
    width: 100%;
    z-index: 1;
    position: relative;
}  
.col1{width: 100%; position: relative; float: left;}
.col2{width: 278px; position: relative; float: left;}
.col3{width: 306px; position: relative; float: left;margin-right: 20px;}
.col4{width: 218px; position: relative; float: left;}