代码如下
<!DOCTYPE html><html> ???<head> ???????<meta ?http-equiv="content-type" content="text/html;charset=utf-8"/> ???????<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> ???????<title>三级联动</title> ???????<script src="../bootstrap/js/jquery-1.11.2.min.js"></script> ???</head> ???<body> ???????<select id="sheng"></select> ???????<select id="shi"></select> ???????<select id="qu"></select> ???</body> ???<script type="text/javascript">$(document).ready(function(e) { ???loadsheng(); ???loadshi(); ???loadqu(); ???$("#sheng").click(function() { ???????loadshi(); ???????loadqu(); ???}) ???$("#shi").click(function() { ???????loadqu(); ???})})function loadsheng() { ???var pcode = "0001"; ???$.ajax({ ???????type: "POST", ???????url: "sanjichuli.php", ???????async: false, ???????data: { pcode: pcode }, ???????dataType: "TEXT", ???????success: function(data) { ???????????//alert(data); ???????????var hang = data.split("|"); ???????????var str = ""; ???????????for(var i = 0; i < hang.length; i++) { ???????????????var lie = hang[i].split("^"); ???????????????str = str + "<option value=‘" + lie[0] + "‘>" + lie[1] + "</option>"; ???????????} ???????????$("#sheng").html(str); ???????} ???});}function loadshi() { ???var pcode = $("#sheng").val(); ???$.ajax({ ???????type: "POST", ???????url: "sanjichuli.php", ???????async: false, ???????data: { pcode: pcode }, ???????dataType: "TEXT", ???????success: function(data) { ???????????var hang = data.split("|"); ???????????var str = ""; ???????????for(var i = 0; i < hang.length; i++) { ???????????????var lie = hang[i].split("^"); ???????????????str = str + "<option value=‘" + lie[0] + "‘>" + lie[1] + "</option>"; ???????????} ???????????$("#shi").html(str); ???????} ???});}function loadqu() { ???var pcode = $("#shi").val(); ???$.ajax({ ???????type: "POST", ???????url: "sanjichuli.php", ???????async: false, ???????data: { pcode: pcode }, ???????dataType: "TEXT", ???????success: function(data) { ???????????var hang = data.split("|"); ???????????var str = ""; ???????????for(var i = 0; i < hang.length; i++) { ???????????????var lie = hang[i].split("^"); ???????????????str = str + "<option value=‘" + lie[0] + "‘>" + lie[1] + "</option>"; ???????????} ???????????$("#qu").html(str); ???????} ???});}</script></html>处理界面代码
<?phpinclude("../DBDA.class.php");$db = new DBDA();$pcode = $_POST["pcode"];$sql = "select * from chinastates where parentareacode=‘{$pcode}‘";echo $db->strquery($sql,1);实现效果如下
jQuery实现三级联动
原文地址：http://www.cnblogs.com/sglq/p/7526627.html