iframe 自适应高度js

iframe 自适应高度

<script>    function calcPageHeight(doc) {        var cHeight = Math.max(doc.body.clientHeight, doc.documentElement.clientHeight);        var sHeight = Math.max(doc.body.scrollHeight, doc.documentElement.scrollHeight);        var height  = Math.max(cHeight, sHeight);        return height;    }    var ifr = document.getElementById('iframepage');    ifr.onload = function() {        var iDoc = ifr.contentDocument || ifr.document;        var height = calcPageHeight(iDoc);        ifr.style.height = height + 'px';    }</script>

放在body最后，document.getElementById()需改