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)
    }
}

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
http://www.cnblogs.com/rubylouvre/archive/2011/01/05/1926226.html