📄 autocomplete.jsp
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<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<HTML><HEAD><TITLE>Shopping Online</TITLE>
<META http-equiv=Content-Type content="text/html; charset=UTF-8">
<LINK href="images/css.css" type=text/css rel=stylesheet>
</HEAD>
<script language="javascript">
var XMLHttpReq;
var completeDiv;
var inputField;
var completeTable;
var completeBody;
//创建XMLHttpRequest对象
function createXMLHttpRequest() {
if(window.XMLHttpRequest) { //Mozilla 浏览器
XMLHttpReq = new XMLHttpRequest();
}
else if (window.ActiveXObject) { // IE浏览器
try {
XMLHttpReq = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
try {
XMLHttpReq = new ActiveXObject("Microsoft.XMLHTTP");
} catch (e) {}
}
}
}
//发送匹配请求函数
function findNames() {
inputField = document.getElementById("names");
completeTable = document.getElementById("complete_table");
completeDiv = document.getElementById("popup");
completeBody = document.getElementById("complete_body");
if (inputField.value.length > 0) {
createXMLHttpRequest();
var url = "autoComplete?action=match&names=" + escape(inputField.value);
XMLHttpReq.open("GET", url, true);
XMLHttpReq.onreadystatechange = processMatchResponse;//指定响应函数
XMLHttpReq.send(null); // 发送请求
} else {
clearNames();
}
}
// 处理返回匹配信息函数
function processMatchResponse() {
if (XMLHttpReq.readyState == 4) { // 判断对象状态
if (XMLHttpReq.status == 200) { // 信息已经成功返回，开始处理信息
setNames(XMLHttpReq.responseXML.getElementsByTagName("res"));
}else { //页面不正常
window.alert("您所请求的页面有异常。");
}
}
}
//生成与输入内容匹配行
function setNames(names) {
clearNames();
var size = names.length;
setOffsets();
var row, cell, txtNode;
for (var i = 0; i < size; i++) {
var nextNode = names[i].firstChild.data;
row = document.createElement("tr");
cell = document.createElement("td");
cell.onmouseout = function() {this.className='mouseOver';};
cell.onmouseover = function() {this.className='mouseOut';};
cell.setAttribute("bgcolor", "#FFFAFA");
cell.setAttribute("border", "0");
cell.onclick = function() { completeField(this); } ;
txtNode = document.createTextNode(nextNode);
cell.appendChild(txtNode);
row.appendChild(cell);
completeBody.appendChild(row);
}
}
//设置显示位置
function setOffsets() {
completeTable.style.width = inputField.offsetWidth; + "px";
var left = calculateOffset(inputField, "offsetLeft");
var top = calculateOffset(inputField, "offsetTop") + inputField.offsetHeight;
completeDiv.style.border = "black 1px solid";
completeDiv.style.left = left + "px";
completeDiv.style.top = top + "px";
}
//计算显示位置
function calculateOffset(field, attr) {
var offset = 0;
while(field) {
offset += field[attr];
field = field.offsetParent;
}
return offset;
}
//填写输入框
function completeField(cell) {
inputField.value = cell.firstChild.nodeValue;
clearNames();
}
//清除自动完成行
function clearNames() {
var ind = completeBody.childNodes.length;
for (var i = ind - 1; i >= 0 ; i--) {
completeBody.removeChild(completeBody.childNodes[i]);
}
completeDiv.style.border = "none";
}
//搜索请求函数
function search() {
var sortName = document.getElementById("names");
createXMLHttpRequest();
var url = "autoComplete?action=search&names=" + escape(inputField.value);
XMLHttpReq.open("GET", url, true);
XMLHttpReq.onreadystatechange = processSearchResponse;//指定响应函数
XMLHttpReq.send(null); // 发送请求
}
// 处理返回匹配信息函数
function processSearchResponse() {
if (XMLHttpReq.readyState == 4) { // 判断对象状态
if (XMLHttpReq.status == 200) { // 信息已经成功返回，开始处理信息
var res=XMLHttpReq.responseXML.getElementsByTagName("res");
if (res.length>0){
document.getElementById("content").value=res[0].firstChild.data;
}
}else { //页面不正常
window.alert("您所请求的页面有异常。");
}
}
}
</script>
<table style="BORDER-COLLAPSE: collapse" borderColor=#111111
cellSpacing=0 cellPadding=2 width=400 bgColor=#f5efe7 border=0>
<TR>
<TD align=middle height=4 colspan="3"><IMG height=4
src="images/promo_list_top.gif" width="100%"
border=0>
</TD>
</TR>
<TR>
<TD align=middle bgColor=#dbc2b0
height=19 colspan="3"><B>商品信息搜索</B>
</TD>
</TR>
<tr>
<td height="20">
输入品牌关键字:
</td>
<td height="20">
<input type="text" size="15" id="names" onkeyup="findNames();" style="height:20;">
<div style="position:absolute;" id="popup">
<table id="complete_table" bgcolor="#FFFAFA" border="0" cellspacing="0" cellpadding="0"/>
<tbody id="complete_body"></tbody>
</table>
</div>
</td>
<td height="20">
<img src="images/search.gif" onclick="search();">
</td>
</tr>
<tr>
<td height="20" valign="top" align="center">
产品描述:
</td>
<td id="pos_1" height="80">
<textarea id="content">
</textarea>
</td>
</tr>
</table>
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