div.filtermenu {
    background-color: #333;
    overflow: auto;
    white-space: nowrap;
  }
  
  div.filtermenu a {
    display: inline-block;
    color: rgb(20, 27, 71);
    text-align: center;
    padding: 5px;
    text-decoration: none;
  }
  
  div.filtermenu a:hover {
    background-color: #777;
  }





div.ex1{

    overflow: scroll;
    overflow-x: hidden;
    height: 500px;
    width: 29%;

}





.cuscloumn {
    float: left;
    width: 29%;
    padding: 10px;
    height: 100%;
    
    /* Should be removed. Only for demonstration */
  }

.cuscloumn-2 {
    border: 0px solid black;
    width:71%;
    padding: 10px;
    height: 100%;
    overflow: scroll;
    
    /* Should be removed. Only for demonstration */
  }

  .cuscloumn-3{
    border: 0px solid black;
    width: 71%;
    padding: 10px;
    height: 100%;
    overflow-y: scroll;
    /* Should be removed. Only for demonstration */
  }


  


.cusrow:after {
    content: "";
    display: table;
    clear: both; 
  }