.box {
    width:100px;
    height:100px;
    border:solid silver 1px;
    float:left;
}

#mainbox {
    border:none;
    overflow-y:auto;
    overflow-x:hidden;
}

#mainbox INPUT {
    background:gold;
    border:none;
    margin:0;
    padding:0;
}

.tile {
    background:-moz-element(#mainbox);
}