.select_free__ {
    position:absolute;
    z-index:10;
    overflow:hidden;/*must have*/
    background: white;
}

.select_free__ iframe {
    display:none;/*sorry for IE5*/
    display/**/:block;/*sorry for IE5*/
    position:absolute;/*must have*/
    top:0;/*must have*/
    left:0;/*must have*/
    z-index:-1;/*must have*/
    filter:mask();/*must have*/
    width:3000px;/*must have for any big value*/
    height:3000px/*must have for any big value*/;
}