div.mybody div.main_text {
    position: relative;
    float: left;
    width: 98%;
    height: auto;
    padding: 0px 1% 0px 1%;
    margin: 0px 0px 0px 0px;
}

div.mybody div.main_text iframe {
    width: 94%;
    min-height: 580px;
    margin: 10px 0px 10px 0px;
}