function Download() {
// IE
if(/msie/i.test(navigator.userAgent)) {
var w = window.open("", "导出", "height=0,width=0,toolbar=no,menubar=no,scrollbars=no,resizable=on,location=no,status=no");
var filename = document.getElementById("filename").value ;
var content = document.getElementById("content").value;
w.document.charset = "UTF-8";
w.document.write(content);
w.document.execCommand("SaveAs", false, filename+'.txt');
w.close();
}
// Firefox/Chrome/Safari/Opera
else {
var filename = document.getElementById("filename").value ;
var content = document.getElementById("content").value;
str = encodeURIComponent(content); 
document.getElementById("SaveChrome").download = filename+'.txt'; 
var aLink = document.getElementById("SaveChrome") ; 
aLink.href = "data:text/csv;charset=utf-8,"+str; 
aLink.click(); 
}
}

function getBoundary() {
var bdary = new BMap.Boundary();
var name = document.getElementById("districtName").value;
bdary.get(name, function (rs) { //获取行政区域
var fileName = "";
var newFileObject = fso.CreateTextFile(folderName + "\\" + name + ".txt", true);
map.clearOverlays(); //清除地图覆盖物
var count = rs.boundaries.length; //行政区域的点有多少个
for (var i = 0; i < count; i++) {
var ply = new BMap.Polygon(rs.boundaries[i], { strokeWeight: 2, strokeColor: "#ff0000" }); //建立多边形覆盖物
map.addOverlay(ply); //添加覆盖物
map.setViewport(ply.getPath()); //调整视野
}
newFileObject.write(rs.boundaries[0]);
newFileObject.Close();
});
} 

amapAdcode.search = function(adcodeLevel, keyword, selectId) {//查询行政区划列表并生成相应的下拉列表
var me = this;
if (adcodeLevel == 'district'||adcodeLevel == 'city') {//第三级时查询边界点
this._district.setExtensions('all');
} else {
this._district.setExtensions('base');
}
this._district.setLevel(adcodeLevel); //行政区级别
this._district.search(keyword, function(status, result) {//注意，api返回的格式不统一，在下面用三个条件分别处理
var districtData = result.districtList[0];
if (districtData.districtList) {
me.createSelectList(selectId, districtData.districtList);
} else if (districtData.districts) {
me.createSelectList(selectId, districtData.districts);
} else {
document.getElementById(selectId).innerHTML = '';
}
map.setCenter(districtData.center);
me.clearMap();
me.addPolygon(districtData.boundaries);