iframe随内容改变高度

// 根据iframe内容动态修改iframe高度,最小高度为648px var getFFVersion=navigator.userAgent.substring(navigator.userAgent.indexOf("Firefox")).split("/")[1] //extra height in px to add to iframe in FireFox 1.0+ browsers var FFextraHeight=getFFVersion>=0.1? 16 : 0 function dyniframesize(iframename) { var pTar = null; if (document.getElementById){ pTar = document.getElementById(iframename); } else{ eval('pTar = ' + iframename + ';'); } if (pTar && !window.opera){ //begin resizing iframe pTar.style.display="block" if (pTar.contentDocument && pTar.contentDocument.body.offsetHeight){ //ns6 syntax pTar.height = pTar.contentDocument.body.offsetHeight+FFextraHeight; } else if (pTar.Document && pTar.Document.body.scrollHeight){ //ie5+ syntax pTar.height = pTar.Document.body.scrollHeight; } } if (pTar.height < 648){ pTar.height = 648; } }