解决html-jquery/js引用外部图片时遇到看不了或出现403的问题

<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("图片url");</script></div>