jQuery的Autocomplete（自动完成、自动填充）插件有不少，但比较下来我感觉，还是bassistance.de的JQuery Autocomplete plugin比较强大，我们就来写一些代码感受一下。
jquery-autocomplete配置：
<script type="text/javascript" src="/js/jquery-1.4.2.min.js"></script>
<script type="text/javascript" src="/js/jquery.autocomplete.min.js"></script>
<link rel="Stylesheet" href="/js/jquery.autocomplete.css" />
首先是一个最简单的Autocomplete（自动完成）代码片段：
1 <html xmlns="http://www.w3.org/1999/xhtml">
2 <head runat="server">
3 <title>AutoComplate</title>
4 <script type="text/javascript" src="/js/jquery-1.4.2.min.js"></script>
5 <script type="text/javascript" src="/js/jquery.autocomplete.min.js"></script>
6 <link rel="Stylesheet" href="/js/jquery.autocomplete.css" />
7 <script type="text/javascript">
8 $(function() {
9 var data = "Core Selectors Attributes Traversing Manipulation CSS Events Effects Ajax Utilities".split(" ");
10
11 $('#keyword').autocomplete(data).result(function(event, data, formatted) {
12 alert(data);
13 });
14 });
15 </script>
16 </head>
17 <body>
18 <form id="form1" runat="server">
19 <div>
20 <input id="keyword" />
21 <input id="getValue" value="GetValue" type="button" />
22 </div>
23 </form>
24 </body>
25 </html>
2 <head runat="server">
3 <title>AutoComplate</title>
4 <script type="text/javascript" src="/js/jquery-1.4.2.min.js"></script>
5 <script type="text/javascript" src="/js/jquery.autocomplete.min.js"></script>
6 <link rel="Stylesheet" href="/js/jquery.autocomplete.css" />
7 <script type="text/javascript">
8 $(function() {
9 var data = "Core Selectors Attributes Traversing Manipulation CSS Events Effects Ajax Utilities".split(" ");
10
11 $('#keyword').autocomplete(data).result(function(event, data, formatted) {
12 alert(data);
13 });
14 });
15 </script>
16 </head>
17 <body>
18 <form id="form1" runat="server">
19 <div>
20 <input id="keyword" />
21 <input id="getValue" value="GetValue" type="button" />
22 </div>
23 </form>
24 </body>
25 </html>
result方法是jQuery Autocomplete插件里的重要方法，它在用户在选定了某个条目时触发。data参数为选中的数据。
一个稍微复杂的例子，可以自定义提示列表:
1 <html xmlns="http://www.w3.org/1999/xhtml">
2 <head runat="server">
3 <title>自定义提示</title>
4 <script type="text/javascript" src="/js/jquery-1.4.2.min.js"></script>
5 <script type="text/javascript" src="/js/jquery.autocomplete.min.js"></script>
6 <link rel="Stylesheet" href="/js/jquery.autocomplete.css" />
7 <script type="text/javascript">
8 var emails = [
9 { name: "Peter Pan", to: "peter@pan.de" },
10 { name: "Molly", to: "molly@yahoo.com" },
11 { name: "Forneria Marconi", to: "live@japan.jp" },
12 { name: "Master <em>Sync</em>", to: "205bw@samsung.com" },
13 { name: "Dr. <strong>Tech</strong> de Log", to: "g15@logitech.com" },
14 { name: "Don Corleone", to: "don@vegas.com" },
15 { name: "Mc Chick", to: "info@donalds.org" },
16 { name: "Donnie Darko", to: "dd@timeshift.info" },
17 { name: "Quake The Net", to: "webmaster@quakenet.org" },
18 { name: "Dr. Write", to: "write@writable.com" },
19 { name: "GG Bond", to: "Bond@qq.com" },
20 { name: "Zhuzhu Xia", to: "zhuzhu@qq.com" }
21 ];
22
23 $(function() {
24 $('#keyword').autocomplete(emails, {
25 max: 12, //列表里的条目数
26 minChars: 0, //自动完成激活之前填入的最小字符
27 400, //提示的宽度，溢出隐藏
28 scrollHeight: 300, //提示的高度，溢出显示滚动条
29 matchContains: true, //包含匹配，就是data参数里的数据，是否只要包含文本框里的数据就显示
30 autoFill: false, //自动填充
31 formatItem: function(row, i, max) {
32 return i + '/' + max + ':"' + row.name + '"[' + row.to + ']';
33 },
34 formatMatch: function(row, i, max) {
35 return row.name + row.to;
36 },
37 formatResult: function(row) {
38 return row.to;
39 }
40 }).result(function(event, row, formatted) {
41 alert(row.to);
42 });
43 });
44 </script>
45 </head>
46 <body>
47 <form id="form1" runat="server">
48 <div>
49 <input id="keyword" />
50 <input id="getValue" value="GetValue" type="button" />
51 </div>
52 </form>
53 </body>
54 </html>
2 <head runat="server">
3 <title>自定义提示</title>
4 <script type="text/javascript" src="/js/jquery-1.4.2.min.js"></script>
5 <script type="text/javascript" src="/js/jquery.autocomplete.min.js"></script>
6 <link rel="Stylesheet" href="/js/jquery.autocomplete.css" />
7 <script type="text/javascript">
8 var emails = [
9 { name: "Peter Pan", to: "peter@pan.de" },
10 { name: "Molly", to: "molly@yahoo.com" },
11 { name: "Forneria Marconi", to: "live@japan.jp" },
12 { name: "Master <em>Sync</em>", to: "205bw@samsung.com" },
13 { name: "Dr. <strong>Tech</strong> de Log", to: "g15@logitech.com" },
14 { name: "Don Corleone", to: "don@vegas.com" },
15 { name: "Mc Chick", to: "info@donalds.org" },
16 { name: "Donnie Darko", to: "dd@timeshift.info" },
17 { name: "Quake The Net", to: "webmaster@quakenet.org" },
18 { name: "Dr. Write", to: "write@writable.com" },
19 { name: "GG Bond", to: "Bond@qq.com" },
20 { name: "Zhuzhu Xia", to: "zhuzhu@qq.com" }
21 ];
22
23 $(function() {
24 $('#keyword').autocomplete(emails, {
25 max: 12, //列表里的条目数
26 minChars: 0, //自动完成激活之前填入的最小字符
27 400, //提示的宽度，溢出隐藏
28 scrollHeight: 300, //提示的高度，溢出显示滚动条
29 matchContains: true, //包含匹配，就是data参数里的数据，是否只要包含文本框里的数据就显示
30 autoFill: false, //自动填充
31 formatItem: function(row, i, max) {
32 return i + '/' + max + ':"' + row.name + '"[' + row.to + ']';
33 },
34 formatMatch: function(row, i, max) {
35 return row.name + row.to;
36 },
37 formatResult: function(row) {
38 return row.to;
39 }
40 }).result(function(event, row, formatted) {
41 alert(row.to);
42 });
43 });
44 </script>
45 </head>
46 <body>
47 <form id="form1" runat="server">
48 <div>
49 <input id="keyword" />
50 <input id="getValue" value="GetValue" type="button" />
51 </div>
52 </form>
53 </body>
54 </html>
formatItem、formatMatch、formatResult是自定提示信息的关键。
formatItem作用在于可以格式化列表中的条目，比如我们加了“I”，让列表里的字显示出了斜体。
formatMatch是配合formatItem使用，作用在于，由于使用了formatItem，所以条目中的内容有所改变，而我们要匹配的是原始的数据，所以用formatMatch做一个调整，使之匹配原始数据，
formatResult是定义最终返回的数据，比如我们还是要返回原始数据，而不是formatItem过的数据。