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);