实现iFrame自适应高度，原来很简单！
<iframe id="iFrame1" name="iFrame1" width="100%" onload="this.height=iFrame1.document.body.scrollHeight" frameborder="0" src="index.htm"></iframe>看到了吧，关键就在于onload="this.height=iFrame1.document.body.scrollHeight"！ 
<iframe id="iFrame1" name="iFrame1" width="100%" onload="this.height=iFrame1.document.body.scrollHeight" frameborder="0" src="index.htm"></iframe>看到了吧，关键就在于onload="this.height=iFrame1.document.body.scrollHeight"！ 
