📄 dylist.jsp
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<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<head>
<META http-equiv=Content-Type content="text/html; charset=UTF-8">
</head>
<script language="javascript">
var XMLHttpReq;
//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) {}
}
}
}
//发送请求函数
function sendRequest(url) {
createXMLHttpRequest();
XMLHttpReq.open("GET", url, true);
XMLHttpReq.onreadystatechange = processResponse;//指定响应函数
XMLHttpReq.send(null); // 发送请求
}
// 处理返回信息函数
function processResponse() {
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
updateList();
} else { //页面不正常
window.alert("您所请求的页面有异常。");
}
}
}
//
function refreshList() {
var sort = document.getElementById("sort").value;
if(sort == "" ) {
clearList();
return;
}
var url = "dyList?sort=" + sort;
sendRequest(url)
}
function updateList() {
clearList();
var product = document.getElementById("product");
var results = XMLHttpReq.responseXML.getElementsByTagName("name");
var option = null;
for(var i = 0; i < results.length; i++) {
option = document.createElement("option");
option.appendChild(document.createTextNode(results[i].firstChild.nodeValue));
product.appendChild(option);
}
}
function clearList() {
var product = document.getElementById("product");
while(product.childNodes.length > 0) {
product.removeChild(product.childNodes[0]);
}
}
</script>
<table style="BORDER-COLLAPSE: collapse" borderColor=#111111
cellSpacing=0 cellPadding=2 width=200 bgColor=#f5efe7 border=0>
<TR>
<TD align=middle height=4 colspan="2"><IMG height=4
src="images/promo_list_top.gif" width="100%"
border=0>
</TD>
</TR>
<TR>
<TD align=middle bgColor=#dbc2b0
height=19 colspan="2"><B>商品搜索</B>
</TD>
</TR>
<tr>
<td height="20">
品牌选择:
</td>
<td height="20">
<select id="sort" onchange="refreshList();">
<option value="default">请选择</option>
<option value="IBM">IBM</option>
<option value="SONY">SONY</option>
<option value="联想">联想</option>
</select>
</td>
</tr>
<tr>
<td height="20">
商品信息:
</td>
<td height="20">
<select id="product" >
</select>
</td>
</tr>
</table>
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