JavaScript实现iframe自动自适应高度

<script type="text/javascript">
  autoAdjustWindow();
</script>
<script type="text/javascript">
//自动调整iframe的高度,自适应树的展开和收缩
function autoAdjustWindow(){ 
  try{ 
    window.frameElement.height=document.body.scrollHeight;
    window.frameElement.parentElement.height=document.body.scrollHeight;
    window.frameElement.width=document.body.scrollWidth;
   window.frameElement.parentElement.width=document.body.scrollWidth; 
  }catch(e){
 
  }
}
</script>