为什么以下代码不能动态插入span节点？
<!DOCTYPE html><html><head> <meta http-equiv="content-type" content="text/html; charset=utf-8"/> <title>插入节点</title> <script type="text/javascript" src="/js/jquery.min.js"></script> <script type="text/javascript"> var p3=document.createElement("span"); p3.text("p3"); p3.insertAfter("div.container"); </script></head><body><div class="container"> <div class="p1">p1<br/></div> <div class="p2">p2<br/></div></div></body></html> $(function () { var p3 =$( document.createElement("span")) p3.text("p3"); p3.insertAfter("div.container"); });