iframe高度自适应

var adjustIframe = function(id, end) {

    var iframe = document.getElementById(id), time = 0, end = end || 30, intervalID

    if (iframe) {

        function callback() {

            time = time + 1

            if (time == end) {

                clearInterval(intervalID)

            }

            var idoc = iframe.contentWindow && iframe.contentWindow.document || iframe.contentDocument;

            var iheight = Math.max(idoc.body.scrollHeight, idoc.documentElement.scrollHeight); //取得其高

            iframe.style.height = iheight + "px";

        }

        intervalID = setInterval(callback, 50)

    }

}

<iframe id="js_sub_web" width="80%" frameborder="0" scrolling="no" allowTransparency="true" src="http://www.cnblogs.com/rubylouvre/archive/2009/09/15/1566722.html">

</iframe>

使用方法：

window.onload = function(){

     adjustIframe("js_sub_web");

}

注意,本脚本只能处理同域的iframe高度

示例

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