本文实例讲述了jquery读取xml文件实现省市县三级联动的方法。分享给大家供大家参考。具体如下：
页面代码如下：
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'city.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
<script type="text/javascript" src="js/jquery-1.7.2.min.js"></script>
<script type="text/javascript">
$(document).ready(function(){
//省
$.ajax({url:"xml/City.xml",
success:function(xml){
$(xml).find("province").each(function(){
var t = $(this).attr("name");//this->
$("#DropProvince").append("<option>"+t+"</option>");
});
}
});
//市
$("#DropProvince").change(function(){
$("#sCity>option").remove();
$("#sArea>option").remove();
var pname = $("#DropProvince").val();
$.ajax({url:"xml/City.xml",
success:function(xml){
///查找<province>下的所有第一级子元素(即城市)
$(xml).find("province[name='"+pname+"']>city").each(function(){
var city = $(this).attr("name");//this->
$("#sCity").append("<option>"+city+"</option>");
});
///查找<city>下的所有第一级子元素(即区域)
var cname = $("#sCity").val();
$(xml).find("city[name='"+cname+"']>area").each(function(){
var area = $(this).attr("name");//this->
$("#sArea").append("<option>"+area+"</option>");
});
}
});
});
//区
$("#sCity").change(function(){
$("#sArea>option").remove();
var cname = $("#sCity").val();
$.ajax({url:"xml/City.xml",
success:function(xml){
///查找<city>下的所有第一级子元素(即区域)
$(xml).find("city[name='"+cname+"']>area").each(function(){
var area = $(this).attr("name");//this->
$("#sArea").append("<option>"+area+"</option>");
});
}
});
});
});
</script>
</head>
<body>
<form id="form1">
<div>
<select id="DropProvince" style="width:100px;">
<option>请选择</option>
</select>
<select id="sCity" style="width:100px;">
<option>请选择相应市</option>
</select>
<select id="sArea" style="width:100px;">
<option>请选择相应区</option>
</select>
</div>
</form>
</body>
</html>
效果图如下：
希望本文所述对大家的jQuery程序设计有所帮助。