#mycustomscroll {
/* Typical fixed height and fixed width example */
width: 511px;
height: 510px;
overflow: auto;
float: left;
/* IE overflow fix, position must be relative or absolute*/
position: relative;
background-color: none;
margin: 0px;
padding: 0px;
outline: none;
}

#mycustomscroll_slim {
/* Typical fixed height and fixed width example */
width: 239px;
height: 510px;
overflow: auto;
float: left;
/* IE overflow fix, position must be relative or absolute*/
position: relative;
background-color: none;
margin: 0px;
padding: 0px;
outline: none;
}