iframe高度自适应
<iframe src="backtop.html" frameborder="0" scrolling="no" id="test" onload="this.height=100"></iframe> <script type="text/javascript"> function reinitIframe(){ var iframe = document.getElementById("test"); try{ var bHeight = iframe.contentWindow.document.body.scrollHeight; var dHeight = iframe.contentWindow.document.documentElement.scrollHeight; var height = Math.max(bHeight, dHeight); iframe.height = height; console.log(height); }catch (ex){} } window.setInterval("reinitIframe()", 200); </script>