#divNewDialogBox > div {
     position: absolute;
     left: 50%;
     top: 150px;
     padding-bottom:5px; 
     background-color: #FFFFFF;
     border: solid 1px;
}

@media only screen and (max-width: 834px) {
     #divNewDialogBox > div {
          max-width: 810px;
     }
}

#divNewDialogBox > div[dialogref*="_2"] { top: 200px; }
#divNewDialogBox > div[dialogref*="_3"] { top: 250px; }