Posted in PHP onDecember 16, 2006
绝对原创
测试地址： http://www.mlmm.cn/mypage/?name=ceshi
测试页代码：
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>php+ajax动态生成下拉菜单</title>
<script language="JavaScript" src="../include/js/regions.js"></script>
</head>
<body>
<form name="form1" method="post" action="">
<tr><td>{$regionss(中华人民共和国)}</td></tr>
</form>
</body>
</html>
regionss 函数代码：
QUOTE:
//省市地3级联动下拉菜单函数 regionss 省.市.地
function regionss($country="中华人民共和国")
{
global $db; $i = 1;
$text="<select id=\"select1\" name=\"select1\" onchange=\"startRequest()\" style=\"width:90px;\"><option value=\"\">省/市/自治区</option>\n"; $result = $db->query("SELECT province FROM ".TABLE_PROVINCE." WHERE country='$country' ORDER BY provinceid");
while($r = $db->fetch_array($result))
{
$text .= "<option value=".$r['province'].">".$r['province']."</option> ";
$i++;
}
$text.="</select>";
$text.=" <select id=\"select2\" name=\"select2\" onchange=\"startRequesta()\" style=\"width:90px;\"><option value=\"\">市/县/区</option></select>\n";
$text.="<select id=\"select3\" name=\"select3\" style=\"width:90px;\"><option value=\"\">县级市/县</option></select>\n";
return $text;
}
regions.js 的代码：
//var ab = new Array();
var xmlHttp;
var xmlHttpa;
function createXMLHttpRequest() {
if (window.ActiveXObject) {
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
}
else if (window.XMLHttpRequest) {
xmlHttp = new XMLHttpRequest();
}
}
function createXMLHttpRequesta() {
if (window.ActiveXObject) {
xmlHttpa = new ActiveXObject("Microsoft.XMLHTTP");
}
else if (window.XMLHttpRequest) {
xmlHttpa = new XMLHttpRequest();
}
} function startRequest() {
createXMLHttpRequest();
createXMLHttpRequesta();
xmlHttp.onreadystatechange = handleStateChange;
xmlHttpa.onreadystatechange = handleStateChangearea;
document.getElementById('select2').options.length = 0;
document.getElementById('select3').options.length = 0;
var url = document.form1.select1.value;
var qurl = "/regions.php?province="+url+"&time="+new Date().getTime();
xmlHttp.open("GET", qurl, true);
xmlHttp.send(null);
//setTimeout("startRequest()",2000);
}
function handleStateChange() {
if(xmlHttp.readyState == 4) {
if(xmlHttp.status == 200) {
var obj = document.getElementById('select2'); //将服务器返回的字符串写到页面中ID为select2的区域
obja = document.getElementById('select3'); //将服务器返回的字符串写到页面中ID为select3的区域
eval(xmlHttp.responseText);
}
}
}
function handleStateChangearea() {
eval(xmlHttpa.responseText);
}
//var ab = new Array();
function startRequesta() {
createXMLHttpRequesta();
xmlHttpa.onreadystatechange = handleStateChangea;
document.getElementById('select3').options.length = 0;
var url = document.form1.select2.value;
var qurl = "/regions.php?city="+url+"&time="+new Date().getTime();
xmlHttpa.open("GET", qurl, true);
xmlHttpa.send(null);
//setTimeout("startRequest()",2000);
}
function handleStateChangea() {
if(xmlHttpa.readyState == 4) {
if(xmlHttpa.status == 200) {
var obja = document.getElementById('select3');
eval(xmlHttpa.responseText);
//将服务器返回的字符串写到页面中ID为select3的区域
}
}
}
数据岛 regions.php 页面代码
<?php
require "common.php";
$city = $city ? $city : "";
$area = $area ? $area : "";
if($province && $city==''){
global $db; $i = 1; $result = $db->query("SELECT DISTINCT city FROM ".TABLE_CITY." WHERE province='$province' ORDER BY cityid");
while($r = $db->fetch_array($result))
{
$r[city]=iconv('gb2312','UTF-8',$r[city]);
echo "obj.options[obj.options.length] = new Option('".$r[city]."','".$r[city]."');\n";
$i++;
}
$resultarea = $db->query("SELECT DISTINCT city FROM ".TABLE_CITY." WHERE province='$province' ORDER BY cityid");
$r = $db->fetch_array($resultarea);
$city = $r[city];
$resulta = $db->query("SELECT DISTINCT area FROM ".TABLE_CITY." WHERE city='$city' ORDER BY cityid");
while($ra = $db->fetch_array($resulta))
{
$ra[area]=iconv('gb2312','UTF-8',$ra[area]);
echo "obja.options[obja.options.length] = new Option('".$ra[area]."','".$ra[area]."');\n";
$i++;
}
}
if($city && $province==''){
global $db; $i = 1;
$result = $db->query("SELECT DISTINCT area FROM ".TABLE_CITY." WHERE city='$city' ORDER BY cityid");
while($r = $db->fetch_array($result))
{
$r[area]=iconv('gb2312','UTF-8',$r[area]);
echo "obja.options[obja.options.length] = new Option('".$r[area]."','".$r[area]."');\n";
$i++;
}
}
?>
地址信息数据库：
采用的是phpcms3.0里自带的数据库，我没有进行任何改动
本程序可以在phpcms3.0里直接使用，若在其他地方使用请自己修改
落伍首发 php+mysql 采用ajax技术的 省 市 地 3级联动无刷新菜单 源码
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