var $body = $('body')
var $iframe = $('<iframe></iframe>').css({width: 500, height: 500})
$iframe.appendTo($('body'))
var iframeDoc = $iframe[0].contentDocument || $iframe[0].contentWindow.document
var htmlStr = `<div id="pic-content"><img src="http://img1.hao123.com/data/3_3dcefd6564f05676dd5e00b544e71f9e_430"></div><script>
var baiduImagePlus = {
noLogo:true,
unionId:'u2665333',
formList:[{formId:2},{formId:16}]
};
<\/script>
<script src="http://cpro.baidustatic.com/cpro/ui/i.js"><\/script>`
iframeDoc.open()
iframeDoc.write(htmlStr)
iframeDoc.close()
var pic = iframeDoc.getElementById('pic-content')
setTimeout(function () {
  var $target = $(pic).clone()
  console.log($target[0])
  $body.append($target)
}, 3000)