div.my_wrapper{
width: 790px;
}

div.my_left_box{
float: left;
padding: 10px;
/* width: 470px; */
vertical-align:top;
/* border-style: none solid none none;
border-width: 1px;
border-color:#b84025; */
}

div.my_right_box{
float: right;
padding: 10px;
/* width: 270px; */
vertical-align:top;
border-style: none none none solid;
border-width: 1px;
border-color:#b84025;
}