html中iframe根据子页面内容动态修改高度

var browserVersion = window.navigator.userAgent.toUpperCase();var isOpera = browserVersion.indexOf("OPERA") > -1 ? true : false;var isFireFox = browserVersion.indexOf("FIREFOX") > -1 ? true : false;var isChrome = browserVersion.indexOf("CHROME") > -1 ? true : false;var isSafari = browserVersion.indexOf("SAFARI") > -1 ? true : false;var isIE = (!!window.ActiveXObject || "ActiveXObject" in window);var isIE9More = (! -[1, ] == false);function reinitIframe(iframeId, minHeight) { ???try { ???????var iframe = document.getElementById(iframeId); ???????var bHeight = 0; ???????if (isChrome == false && isSafari == false) ???????????bHeight = iframe.contentWindow.document.body.scrollHeight; ???????var dHeight = 0; ???????if (isFireFox == true) ???????????dHeight = iframe.contentWindow.document.documentElement.offsetHeight + 2; ???????else if (isIE == false && isOpera == false) ???????????dHeight = iframe.contentWindow.document.documentElement.scrollHeight; ???????else if (isIE == true && isIE9More) {//ie9+ ???????????var heightDeviation = bHeight - eval("window.IE9MoreRealHeight" + iframeId); ???????????if (heightDeviation == 0) { ???????????????bHeight += 3; ???????????} else if (heightDeviation != 3) { ???????????????eval("window.IE9MoreRealHeight" + iframeId + "=" + bHeight); ???????????????bHeight += 3; ???????????} ???????}else//ie[6-8]、OPERA ???????????bHeight += 3; ???????var height = Math.max(bHeight, dHeight); ???????if (height < minHeight) height = minHeight; ???????iframe.style.height = height + "px"; ???} catch (ex) { }}function startInit(iframeId, minHeight) { ???eval("window.IE9MoreRealHeight" + iframeId + "=0"); ???window.setInterval("reinitIframe(‘" + iframeId + "‘," + minHeight + ")", 100);}var minHeight = $(window).height();startInit(‘contents‘, minHeight);