html, body {
    width: 100%;
    height: 1300px;
    overflow: hidden;
}

.divholder1 {
    width: 800px;
    height: 100%;
    display: inline-block;
    overflow: hidden;
   
}

.divholder2 {
    width: 800px;
    height: 100%;
    display: inline-block;
    overflow: hidden;
    margin-left: -170px;
    
}

.divholder3 {
    width: 800px;
    height: 100%;
    display: inline-block;
    overflow: hidden;
    margin-left: -170px;
    margin-right: -200px;
   
}

.contentiframe {
    -ms-zoom: 0.75;
    -moz-transform: scale(0.77);
    -moz-transform-origin: 0 0;
    -o-transform: scale(0.77);
    -o-transform-origin: 0 0;
    -webkit-transform: scale(0.77);
    -webkit-transform-origin: 0 0;
    overflow: hidden;
    border: 1px solid transparent;
    height: 100%;
    width: 100%;
    float: left;
   
}