省份城市菜单联动，AJAX 3级菜单联动_PHP教程

首先看JQ的扩展如下：

//city selected

jQuery.fn.cityselect = function(n,s1,s2,s3) {
if ((n!=3)&&(n!=2)) {n=2};
if (s1=="") {s1="province"};
if (s2=="") {s2="city"};
if (s3=="") {s3="area"};

if (n==2){//二级联动
//alert(s1+$("select[@name="+s1+"] option[@selected]").val());
$("select[@name="+s1+"]").bind("change",function(event) {
$.ajax({
type: "GET",
url: "/inc/lib/ajax_city.php",
data: "n=v2&cityid="+$("select[@name="+s1+"] option[@selected]").val(),
success: function(opt){$("select[@name="+s2+"]").empty().append(opt);}
});
});

}

if (n==3){//三级联动

$("select[@name="+s1+"]").bind("change",function(event) {
$.ajax({
type: "GET",
url: "/inc/lib/ajax_city.php",
data: "n=v2&cityid="+$("select[@name="+s1+"] option[@selected]").val(),
success: function(opt){
$("select[@name="+s2+"]").empty().append(opt);
$.ajax({
type: "GET",
url: "/inc/lib/ajax_city.php",
data: "n=v3&cityid="+$("select[@name="+s2+"] option[@selected]").val(),
success: function(opt){
$("select[@name="+s3+"]").empty().append(opt);
}
});
}
});
});
$("select[@name="+s2+"]").bind("change",function(event) {
$.ajax({
type: "GET",
url: "/inc/lib/ajax_city.php",
data: "n=v3&cityid="+$("select[@name="+s2+"] option[@selected]").val(),
success: function(opt){ $("select[@name="+s3+"]").empty().append(opt);}
});

});

}

};

接下来是PHP里的函数如下========

//城市联动脚本
function cityselect($n=2,$s1=province,$s2=city,$s3=area,$v1=320000,$v2=320500,$v3=320501){
$db = new DB_Sql; //初始化数据库
$db->connect(DB_Database, DB_Host, DB_User, DB_Password); //数据库连接
$db->DB_Sql("set names gbk");
//联动AJAX脚本
$tmp = " ";
//省份选择
$tmp .= " ";
$db->query("select * from sz_chinacity where right(CityPostCode, 4) = 0000 order by CityID asc");
while ($db->next_record()){
if ($db->Record[CityPostCode]==$v1){
$tmp .= "Record[CityPostCode]."" selected>".$db->Record[CityName]." ";
}else{
$tmp .= "Record[CityPostCode]."">".$db->Record[CityName]." ";
}
}
$tmp .= " ";
//城市选择
$tmp .= " ";
$cityid = substr($v1,0,2);
$db->query("select * from sz_chinacity where Right(CityPostCode, 2) = 00 and Left(CityPostCode, 2)=".$cityid." and Right(CityPostCode, 4) 0000 order by CityID asc");
while ($db->next_record()){
if ($db->Record[CityPostCode]==$v2){
$tmp .= "Record[CityPostCode]."" selected>".$db->Record[CityName]." ";
}else{
$tmp .= "Record[CityPostCode]."">".$db->Record[CityName]." ";
}
}
$tmp .= " ";


if ($n==3){
//地区选择
$tmp .= " ";
$cityid = substr($v2,0,4);
$db->query("select * from sz_chinacity where Left(CityPostCode, 4)=".$cityid." and Right(CityPostCode, 2) 00 order by CityID asc");
while ($db->next_record()){
if ($db->Record[CityPostCode]==$v3){
$tmp .= "Record[CityPostCode]."" selected>".$db->Record[CityName]." ";
}else{
$tmp .= "Record[CityPostCode]."">".$db->Record[CityName]." ";
}
}
$tmp .= " ";
}
echo $tmp;
}

调用的时候：

http://www.bkjia.com/PHPjc/486524.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/486524.htmlTechArticle首先看JQ的扩展如下： //city selected jQuery.fn.cityselect = function(n,s1,s2,s3) { if ((n!=3)(n!=2)) {n=2}; if (s1==) {s1=province}; if (s2==) {s2=city}; if (s3==) {s3=are...