一个Ajax文本框输入提示的例子,用asp实现:
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"];
- objobj = 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();" onclick="getKeyWord();" />
- <div id="keytishi"></div>
- </body>
- </html>
后台文件 [input.asp]
- <%...@LANGUAGE="VBSCRIPT" CODEPAGE="65001"%>
-
- <%...
- 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);" onclick="input('<%Response.Write(escape(rs("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