index.html
<div id="div1"> </div> <iframe src="ajax2.html" name="frame2" frameborder="0"></iframe> <script type="text/javascript"> $("#div1").data("datagrid", {name: "叶龙龙"}); </script>
ajax2.html
console.log($("#div1",parent["frame2"].document).data());
https://stackoverflow.com/questions/4101457/access-jquery-data-from-iframe-element
https://stackoverflow.com/questions/4941435/how-to-share-jquery-data-data-through-iframes
原文：http://www.cnblogs.com/yeminglong/p/7459521.html