<script type="text/javascript">
    function showImg(url) {
            var frameid = 'frameimg' + Math.random();
            window.img = '<img id="img" style="width: 100%;height: auto" src=\'' + url + '?' + Math.random() + '\' /><script>window.onload = function() { parent.document.getElementById(\'
 
' + frameid + '\').height = document.getElementById(\'img\').height+\'px\'; }<' + '/script>';
           document.write('<iframe id="' + frameid + '" src="javascript:parent.img;" frameBorder="0" scrolling="no" width="100%"></iframe>');
         }
</script>

<div>
    <script 
 
type="text/javascript">showImg("圖片url");</script>
</div>

本人已經測試通過了