只要在div前加上
<iframe id="aaaa" style="position: absolute; z-index: 9; expression(this.nextSibling.offsetWidth);
height: expression(this.nextSibling.offsetHeight); top: expression(this.nextSibling.offsetTop);
left: expression(this.nextSibling.offsetLeft);" frameborder="0"></iframe>
就能解决此问题