上次给大家介绍了两种用jquery实现的方法，今天给大家介绍另一种方法。

<script 

type="text/javascript">
    //iframe 自适应高度
     function SetCwinHeight(){
      var bobo=document.getElementById("main"); //iframe id
      if 

(document.getElementById){
       if (bobo && !window.opera){
        if (bobo.contentDocument && bobo.contentDocument.body.offsetHeight){

bobo.height = bobo.contentDocument.body.offsetHeight;
        }else if(bobo.Document && bobo.Document.body.scrollHeight){
         bobo.height = 

bobo.Document.body.scrollHeight+30;
         //alert(document.getElementById("amdright").style.width);
        }
       }
      }
     }

</script>
<iframe width="99%" id="main" name="main" onload="SetCwinHeight()" frameborder="0" src="default.php" scrolling="no"></iframe>