Ajax文本框输入提示
2009-03-25 10:39:22 来源：WEB开发网今天我来做一个Ajax文本框输入提示的例子:
前台文件
<!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>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>文本框输入提示</title>
<style type="text/CSS">...
<!--
.keyWord {...}{width:150px; height:20px; border:#0066FF 1px solid;}/**//*文本框样式*/
#keytishi {...}{width:150px; height:auto; border:#0066FF 1px solid; position:absolute; display:none;}/**//*提示层样式*/
#keytishi ul {...}{ margin:0;}/**//*提示层样式*/
#keytishi ul li{...}{margin:0;list-style-type:none; line-height:16px; height:16px; font-size:12px; padding:2px;}/**//*提示层样式*/
#keytishi ul li a {...}{display:block; width:150px; height:16px; text-decoration:none;}/**//*提示层样式*/
#keytishi ul li a:hover {...}{background-color:#0099FF;}/**//*提示层样式*/
-->
</style>
<script type="text/javascript">...
<!--
//建立xmlhttpRequest对象
var xmlhttp;
try...{
xmlhttp= new ActiveXObject('Msxml2.XMLHTTP');
}catch(e)...{
try...{
xmlhttp= new ActiveXObject('Microsoft.XMLHTTP');
}catch(e)...{
try...{
xmlhttp= new XMLHttPRequest();
}catch(e)...{}
}
}
function getKeyWord()...{
var obj = document.getElementById("search");//获取文本域对象
if(obj.value=="")...{
return;
}
var top=0;
var left=0;
while(obj)...{//此循环得到文件域对象在页面中的绝对位置
top += obj["offsetTop"];
left += obj["offsetLeft"];
obj = obj.offsetParent;
}
xmlhttp.open("get","input.asp?keyword="+document.getElementById("search").value,true);
xmlhttp.onreadystatechange = function()...{
if(xmlhttp.readyState == 4)
...{
if(xmlhttp.status == 200)
...{
if(xmlhttp.responseText!="")...{
document.getElementById("keytishi").innerHTML = unescape(xmlhttp.responseText);//把后台返回的数据填充到提示层
document.getElementById("keytishi").style.left = left + "px";//设置提示层的位置,左
document.getElementById("keytishi").style.top = (top + 25) + "px";//设置提示层的位置,上
document.getElementById("keytishi").style.display = "block";//设置提示层可见
}else...{
document.getElementById("keytishi").innerHTML = "";//清空提示层
document.getElementById("keytishi").style.display = "none";//设置提示层不可见
}
}
else...{
}
}
}
xmlhttp.setRequestHeader("If-Modified-Since","0");
xmlhttp.send(null);
}
function input(str)...{
document.getElementById("search").value=str;//从提示层选择你需要的数据填充到文本框
document.getElementById("keytishi").innerHTML = "";//清空提示层
document.getElementById("keytishi").style.display = "none";//设置提示层不可见
}
//-->
</script>
</head>
<body>
<input type="text" class="keyword" id="search" name="search" onkeyup="getKeyWord();" />
<div id="keytishi"></div><!--提示层-->
</body>
</html>
后台文件 [input.asp]
<%...@LANGUAGE="VBSCRIPT" CODEPAGE="65001"%>
<!--#include file="conn.asp"-->
<%...
dim rs
dim sql
dim keyWords
keyWrods = Request("keyword")
Set rs = Server.CreateObject("ADODB.Recordset")
sql = "select * from king_test where keyword like '%"&keyWrods&"%'"
rs.open sql,conn,1,1
if not (rs.bof and rs.eof) then
Response.Write("<ul>")
do while not rs.eof
%>
<li><a href="Javascript:void(null);" keyword")))%>');"><%...Response.Write(escape(rs("keyword")))%></a></li>
<%...
rs.movenext
loop
Response.Write("<ul>")
end if
rs.close
set rs = nothing
conn.close
Set conn = nothing
%>
escape与unescape是用来编码的和解码的,这是为了避免汉字出现乱码
在XP + IE6,7,Firefox测试通过
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