网页代码如下：
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head runat="server">
<title>
</title>
<link href="Scripts/StyleSheet.css" rel="stylesheet" type="text/css" />
<script src="Scripts/jquery-1.4.1.min.js" type="text/javascript">
</script>
<script src="Scripts/JScript2.js" type="text/javascript">
</script>
</head>
<body>
<form style="text-align: center" id="form1" runat="server">
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<input style="width:500px;" url="true" id="Text1" type="text" /><br/>
<input style="width:500px;" id="Text2" type="text" />
<div style="display: none; position: absolute;" id="allSitesBoxHdl" class="classlist" onmouseover="this.style.display='block'" onmouseout="this.style.display='none'">
<ul id="allSitesBoxContent">
</ul>
</div>
<script type="text/javascript">
Init();
</script>
</form>
</body>
</html>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head runat="server">
<title>
</title>
<link href="Scripts/StyleSheet.css" rel="stylesheet" type="text/css" />
<script src="Scripts/jquery-1.4.1.min.js" type="text/javascript">
</script>
<script src="Scripts/JScript2.js" type="text/javascript">
</script>
</head>
<body>
<form style="text-align: center" id="form1" runat="server">
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<input style="width:500px;" url="true" id="Text1" type="text" /><br/>
<input style="width:500px;" id="Text2" type="text" />
<div style="display: none; position: absolute;" id="allSitesBoxHdl" class="classlist" onmouseover="this.style.display='block'" onmouseout="this.style.display='none'">
<ul id="allSitesBoxContent">
</ul>
</div>
<script type="text/javascript">
Init();
</script>
</form>
</body>
</html>
好了我们一起浏览一下效果吧
效果还不错吧！说到这里不仅仅是百度这样，像Soso，Sogou等都可以使用同样的方法来实现。
大家如有兴趣的话可以下载这个例子看看。下载地址：http://files.cnblogs.com/sufei/baiduList.zip
