아이프레임 리사이즈

function resizeFrame(iframeObj){
  var innerBody = iframeObj.contentWindow.document.body;
  var innerHeight = innerBody.scrollHeight + (innerBody.offsetHeight - innerBody.clientHeight);
  var innerWidth = innerBody.scrollWidth + (innerBody.offsetWidth - innerBody.clientWidth);
  if(innerHeight>0 && innerWidth>0){
   iframeObj.style.height = innerHeight;
   iframeObj.style.width = innerWidth;
  }
 }

<iframe name="ifrmComment" src="/event/inc/ifrm_reply.asp?board_code=3&curPage=<%=curPage%>" width="860" height="300" marginwidth="0" marginheight="0" scrolling="no" border="1" frameborder="0" style="" onload="resizeFrame(this);"> </iframe>