html, body {
  width:100%;height:100%;overflow:hidden;border:0;margin:0;padding:0;
}
/*scaler*/
.scaler{position:absolute;width:200%;height:200%;top:-50%;left:-50%;background:#fff;display:table}
.scaler div{position:absolute;left:0;top:50%;width:100%}
.scaler > div{display:table-cell;vertical-align:middle;height:100%;position:static;top:0}
.scaler img{margin:0
auto;display:block;width:50%;-ms-interpolation-mode:bicubic}
*:first-child+html .scaler img{position:relative;top:-50%} /*Fix IE7*/
*:first-child+html .scaler div{position:absolute;top:50%;height:auto}/*Fix IE7*/
* html .scaler img{height:50%;position:relative;top:-50%} /*Fix IE6*/