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代码编辑器：
<!DOCTYPE html> <script> $(document).ready(function(){ $("div").on("click","p",function(){ $(this).slideToggle(); }); $("button").click(function(){ $("<p>This is a new paragraph.</p>").insertAfter("button"); }); }); </script> <div style="background-color:yellow"> <p>This is a paragraph.</p> <p>Click any p element to make it disappear. Including this one.</p> <button>Insert a new p element after this button</button> </div> <footer>简单教程，简单编程<br/>Copyright © 简单教程 www.twle.cn</footer>
运行结果：