<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Basic EasyLoader - jQuery EasyUI Demo</title> <link rel="stylesheet" type="text/css" href="http://www.java1234.com/jquery-easyui-1.3.3/themes/default/easyui.css"> <link rel="stylesheet" type="text/css" href="http://www.java1234.com/jquery-easyui-1.3.3/themes/icon.css"> <link rel="stylesheet" type="text/css" href="http://www.java1234.com/jquery-easyui-1.3.3/demo/demo.css"> <script type="text/javascript" src="http://www.java1234.com/jquery-easyui-1.3.3/jquery.min.js"></script> <script type="text/javascript" src="http://www.java1234.com/jquery-easyui-1.3.3/jquery.easyui.min.js"></script> <script type="text/javascript" src="http://www.java1234.com/jquery-easyui-1.3.3/locale/easyui-lang-zh_CN.js"></script> </head> <body> <div style="position: relative; overflow: hidden; border: 1px solid #ccc; width: 500px; height: 300px"> <div class="easyui-draggable" data-options="onDrag:onDrag" style="width: 100px; height: 100px; background: #fafafa; border: 1px solid #ccc;"> </div> </div> </body> <script type="text/javascript"> function onDrag(e){ var d = e.data; if (d.left < 0){d.left = 0} if (d.top < 0){d.top = 0} if (d.left + $(d.target).outerWidth() > $(d.parent).width()){ d.left = $(d.parent).width() - $(d.target).outerWidth(); } if (d.top + $(d.target).outerHeight() > $(d.parent).height()){ d.top = $(d.parent).height() - $(d.target).outerHeight(); } } </script> </html>
原文：http://www.cnblogs.com/javaweb2/p/6285323.html