三级地市联动菜单演示兼容 ie chrome代码,JS代码库,德仔网

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【JS】三级地市联动菜单演示兼容 ie chrome
作者:林夕9527 / 发布于2013/3/1/ 1359
三级地市联动菜单演示兼容 ie chrome

	<html>
	<head runat="server">
	 <title>三级地市联动菜单演示</title>
	</head>
	<body onload="Init('','','')">
	<!-- 第一次初始化 // <body onload="Init('','','')">-->
	 <form id="form1" runat="server">
	 <div>
	 <select id="Select1" name="Select1" runat="server" onchange="selectCity();">
	 <option value="" selected="true">省/直辖市</option>
	 </select>
	 <select id="Select2" name="Select2" runat="server" onchange="selectcounty()">
	 <option value="" selected="true">请选择</option>
	 </select>
	 <select id="Select3" name="Select3" runat="server">
	 <option value="" selected="true">请选择</option>
	 </select>
	 </div>
	 </form>
	</body>
	</html>
	<script src="CascadeJs.js"></script>

	

	/**
	* @name jQuery Cascdejs plugin
	* @author zdy
	* @version 1.0
	*/

	//首先需要初始化
	var xmlDoc;
	var TopnodeList;
	var citys;
	var countyNodes;
	var nodeindex = 0;
	var childnodeindex = 0;
	//获取xml文件
	function Init(v1,v2,v3) {
	 //打开xlmdocm文档
	 xmlDoc = loadXmlFile('Area.xml');
	 var dropElement1 = document.getElementById("Select1");
	 var dropElement2 = document.getElementById("Select2");
	 var dropElement3 = document.getElementById("Select3");
	 RemoveDropDownList(dropElement1);
	 RemoveDropDownList(dropElement2);
	 RemoveDropDownList(dropElement3);
	 if (window.ActiveXObject) {
	 TopnodeList = xmlDoc.selectSingleNode("address").childNodes;
	 }
	 else {
	 TopnodeList = xmlDoc.childNodes[0].getElementsByTagName("province");
	 }
	 if (TopnodeList.length > 0) {
	 //省份列表
	 var county;
	 var province;
	 var city;
	 for (var i = 0; i < TopnodeList.length; i++) {
	 //添加列表项目
	 county = TopnodeList[i];
	 var option = document.createElement("option");
	 option.value = county.getAttribute("name");
	 option.text = county.getAttribute("name");
	 if (v1 == option.value) {
	 option.selected = true;
	 nodeindex = i;
	 }
	 dropElement1.add(option);
	 }
	 if (TopnodeList.length > 0) {
	 //城市列表
	 citys = TopnodeList[nodeindex].getElementsByTagName("city")
	 for (var i = 0; i < citys.length; i++) {
	 var id = dropElement1.options[nodeindex].value;
	 //默认为第一个省份的城市
	 province = TopnodeList[nodeindex].getElementsByTagName("city");
	 var option = document.createElement("option");
	 option.value = province[i] .getAttribute("name");
	 option.text = province[i].getAttribute("name");
	 if (v2 == option.value) {
	 option.selected = true;
	 childnodeindex = i;
	 }
	 dropElement2.add(option);
	 }
	 if (province .length> 0) {
	 //县列表
	 for (var i = 0; i < TopnodeList[0].childNodes.length; i++) {
	 var id = dropElement2.options[0].value;
	 //默认为第一个城市的第一个县列表
	 city = province[childnodeindex].getElementsByTagName("county");;
	 var option = document.createElement("option");
	 option.value = city[i].getAttribute("name");
	 option.text = city[i].getAttribute("name");
	 if (v3 == option.value) {
	 option.selected = true;
	 }
	 this.document.getElementById("Select3").add(option);
	 }
	
	 }
	 }
	 }
	}

	/*
	//依据省设置城市，县
	*/
	function selectCity() {
	 var dropElement1 = document.getElementById("Select1");
	 var name = dropElement1.options[dropElement1.selectedIndex].value;
	 countyNodes = TopnodeList[dropElement1.selectedIndex];
	 var province = document.getElementById("Select2");
	 var city = document.getElementById("Select3");
	 RemoveDropDownList(province);
	 RemoveDropDownList(city);
	 var citynodes;
	 var countycodes;
	 if (window.ActiveXObject) {
	 citynodes = xmlDoc.selectSingleNode('//address/province [@name="' + name + '"]').childNodes;
	 } else {
	 citynodes = countyNodes.getElementsByTagName("city")
	 }
	 if (window.ActiveXObject) {
	 countycodes = citynodes[0].childNodes;
	 } else {
	 countycodes = citynodes[0].getElementsByTagName("county")
	 }
	
	 if (citynodes.length > 0) {
	 //城市
	 for (var i = 0; i < citynodes.length; i++) {
	 var provinceNode = citynodes[i];
	 var option = document.createElement("option");
	 option.value = provinceNode.getAttribute("name");
	 option.text = provinceNode.getAttribute("name");
	 province.add(option);
	 }
	 if (countycodes.length > 0) {
	 //填充选择省份的第一个城市的县列表
	 for (var i = 0; i < countycodes.length; i++) {
	 var dropElement2 = document.getElementById("Select2");
	 var dropElement3 = document.getElementById("Select3");
	 //取当天省份下第一个城市列表
	
	 //alert(cityNode.childNodes.length);
	 var option = document.createElement("option");
	 option.value = countycodes[i].getAttribute("name");
	 option.text = countycodes[i].getAttribute("name");
	 dropElement3.add(option);
	 }
	 }
	 }
	}
	/*
	//设置县,区
	*/
	function selectcounty() {
	 var dropElement1 = document.getElementById("Select1");
	 var dropElement2 = document.getElementById("Select2");
	 var name = dropElement2.options[dropElement2.selectedIndex].value;
	 var city = document.getElementById("Select3");
	 var countys = TopnodeList[dropElement1.selectedIndex].getElementsByTagName("city")[dropElement2.selectedIndex].getElementsByTagName("county")
	 RemoveDropDownList(city);
	 for (var i = 0; i < countys.length; i++) {
	 var countyNode = countys[i];
	 var option = document.createElement("option");
	 option.value = countyNode.getAttribute("name");
	 option.text = countyNode.getAttribute("name");
	 city.add(option);
	 }
	}
	function RemoveDropDownList(obj) {
	 if (obj) {
	 var len = obj.options.length;
	 if (len > 0) {
	 for (var i = len; i >= 0; i--) {
	 obj.remove(i);
	 }
	 }
	 }

	}
	/*
	//读取xml文件
	*/
	function loadXmlFile(xmlFile) {
	 var xmlDom = null;
	 if (window.ActiveXObject) {
	 xmlDom = new ActiveXObject("Microsoft.XMLDOM");
	 xmlDom.async = false;
	 xmlDom.load(xmlFile) || xmlDom.loadXML(xmlFile);//如果用的是XML字符串//如果用的是xml文件
	 } else if (document.implementation && document.implementation.createDocument) {
	 var xmlhttp = new window.XMLHttpRequest();
	 xmlhttp.open("GET", xmlFile, false);
	 xmlhttp.send(null);
	 xmlDom = xmlhttp.responseXML;
	 } else {
	 xmlDom = null;
	 }
	 return xmlDom;
	}
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