<iframe frameborder="0" src="https://www.m1850.com/uploads/allimg/200205/1254151330-0.jpg" class="iframe" frameborder="0" id="test" onload="this.height=100" width="762px" scrolling="no"></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>
