iframe自适应高度 原

 <div id ="div1"> 
		 <iframe src="zencoding test.html"  frameborder="0" scrolling="no"  width='100%' id="content_iframe"  ></iframe>
		 </div>

<script>
		
		 //自适应 iframe 内容高度
        function reinitIframe() {
            var iframe = document.getElementById("content_iframe");
    
            try {
                var userAgent = window.navigator.userAgent; //取得浏览器的userAgent字符串
                if (userAgent.indexOf("Chrome") > -1) {
                    var bHeight = iframe.contentWindow.document.documentElement.scrollHeight;//documentElement 不能替换成body 否则 google浏览器不兼容
     
                } else {
                    var bHeight = iframe.contentWindow.document.body.scrollHeight;//documentElement 不能替换成body 否则 google浏览器不兼容
                 

                }

                iframe.height = bHeight;
    
            } catch (ex) {

            }
        }
        window.setInterval("reinitIframe()", 200);
		</script>

	<div class="demo">
		<div class="opt_btn">
			<button onclick="getData('iframeH');">加载内容1</button>
			<button onclick="getData('iframeH2');">加载内容2</button>
		</div>
		<iframe src="iframeH.html" id="ifrm" frameborder="0" width="100%" scrolling="no" marginheight="0" marginwidth="0" onLoad="setIframeHeight(this.id)"></iframe>
	</div>

<script type="text/javascript"> 
function getData(ifm){
	document.getElementById("ifrm").src = ifm+'.html';
	
}
function getDocHeight(doc) {
    doc = doc || document;
    var body = doc.body, html = doc.documentElement;
    var height = Math.max( body.scrollHeight, body.offsetHeight, 
        html.clientHeight, html.scrollHeight, html.offsetHeight );
    return height;
}

function setIframeHeight(id) {
    var ifrm = document.getElementById(id);
    var doc = ifrm.contentDocument? ifrm.contentDocument: 
        ifrm.contentWindow.document;
    ifrm.style.visibility = 'hidden';
    ifrm.style.height = "10px"; // reset to minimal height ...
    ifrm.style.height = getDocHeight( doc ) + 4 + "px";
    ifrm.style.visibility = 'visible';
}
</script>