1、访问jQuery UI官方网站Demo页面，如下图所示。
2、 本经验学习Widgets（窗口小部件），Widgets are full-featured UI controls that bring the richness of desktop applications to the Web. All widgets provide a solid core with plenty of extension points for customizing behavior, as well as full theming support.（Widgets是全特性UI控件，它们给wWeb应用程序带来了桌面应用程序的丰富性。）
jQuery UI 窗口小部件由以下部分组成，分别为Accordion、Autocomplete、Button、Datepicker、Dialog、Menu、Progressbar、Selectmenu、Slider、Spinner、Tabs、Tooltip等，如下图所示。
3、Widgets第1个为Accordion（手风琴）。Click headers to expand/collapse content that is broken into logical sections, much like tabs. Optionally, toggle sections open/closed on mouseover。如下图所示。
4、Widgets第2个为Autocomplete（自动完成）。The Autocomplete widgets provides suggestions while you type into the field. Here the suggestions are tags for programming languages, give "ja" (for Java or JavaScript) a try.
5、Widgets第3个为Button（按钮）。Enhances standard form elements like buttons, inputs and anchors to themeable buttons with appropriate hover and active styles.
6、Widgets第4个为Datepicker（日期控件）。The datepicker is tied to a standard form input field. Focus on the input (click, or use the tab key) to open an interactive calendar in a small overlay. Choose a date, click elsewhere on the page (blur the input), or hit the Esc key to close. If a date is chosen, feedback is shown as the input's value.
