日期:2014-05-16 浏览次数:20433 次
<script type="text/javascript"> window.onload = function () { //得到省的select节点 var provences = document.getElementById("prvence"); provences.onchange = function () { var provenceName = this.value; var city = document.getElementById("city"); //删除city中的原有数据 var citys = city.getElementsByTagName("option"); //在省的下拉框出现onchange的时候先清空city的下拉框的内容 var lens = citys.length; for(var k=lens-1;k>=0;k--) { city.removeChild(citys[k]); } var xmlDoc = loadXML("cities.xml"); //加载xml文档,并获得xml文档对象 var provence = xmlDoc.getElementsByTagName("provence"); var len = provence.length; //省的节点一共有多少个 var cities = new Array(); for(var i=0;i<len;i++)//xml中省的节点 { var provenceElements = provence[i]; pro = provenceElements.getAttribute("name"); if(provenceName==pro) { cities = provenceElements.getElementsByTagName("city"); } } var optionies = new Array(); for(var j=0;j<cities.length;j++) { optionies = document.createElement("option"); optionies.innerText= cities[j].text; city.appendChild(optionies); } } } //加载xml文档 var xmlDoc; function loadXML(fname) { var xmlDoc; try { xmlDoc = new ActiveXObject("Microsoft.XMLDOM"); } catch (e) { try { xmlDoc = document.implementation.createDocument("", "", null); } catch (e) { alert(e.message); } } try { xmlDoc.async = false; xmlDoc.load(fname); } catch (e) { } return xmlDoc; } </script>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>js实现联动</title> <!--当用户选择一个省时第二个下拉框出现相应省的市--> <script type="text/javascript"> window.onload = function () { //得到省的select节点 var provences = document.getElementById("prvence"); provences.onchange = function () { var provenceName = this.value; var city = document.getElementById("city"); //删除city中的原有数据 var citys = city.getElementsByTagName("option"); //在省的下拉框出现onchange的时候先清空city的下拉框的内容 var lens = citys.length; for(var k=lens-1;k>=0;k--) { city.removeChild(citys[k]); } var xmlDoc = loadXML("cities.xml"); //加载xml文档,并获得xml文档对象 var provence = xmlDoc.getElementsByTagName("provence"); var len = provence.length; //省的节点一共有多少个 var cities = new Array(); for(var i=0;i<len;i++)//xml中省的节点 { var provenceElements = provence[i]; pro = provenceElements.getAttribute("name"); if(provenceName==pro) { cities = provenceElements.getElementsByTagName("city"); } } var optionies = new Array(); for(var j=0;j<cities.length;j++) { optionies = document.createElement("option"); optionies.innerText= cities[j].text; city.appendChild(optionies); } } } //加载xml文档 var xmlDoc; function loadXML(fname) { var xmlDoc; try { xmlDoc = new ActiveXObject("Microsoft.XMLDOM"); } catch (e) { try { xmlDoc = document.implementation.createDocument("", "", null); } catch (e) { alert(e.message); } } try { xmlDoc.async = false; xmlDoc.load(fname); } catch (e) { } return xmlDoc; } </script> </head> <body> <select id="prvence"> <option>----请选择----</option> <option value="北京市">北京市</option> <option value="湖南省">湖南省</option> <option value="黑龙江">黑龙江</option> <option value="广东省">广东省</option> </select> <select id="city"> <option>----请选择----<