根据城市的汉语名称首字母把城市排序，基本思路：
1.处理数据，按照需要的格式分别添加{HOT:{hot:[],ABCDEFG:{a:[1,2,3],b:[1,2,3]},HIGHLMN:{},OPQRSTU:{},VWXYZ:{}}
2.解析数据 创建数据div 给需要功能的input分别添加事件
效果预览：http://jsfiddle.net/dtdxrk/xdftL/embedded/result/
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>原生Js汉语拼音首字母匹配城市名</title>
<style type="text/css">
*{margin: 0;padding: 0} /*弹出城市列表*/
div#popCity{ visibility: hidden; font: 13px Arial;position: absolute;top: 0;left: 0;background-color: #fff; box-shadow: 2px 2px 3px rgba(0,0,0,0.3);border: 1px solid #85BEE5;width: 400px;}
div#popCity h1{font-size: 14px;background-color:#85BEE5;padding: 5px;color: #fff; }
ul#popMenu{margin-top: 5px;overflow: hidden;zoom:1;}
ul#popMenu li{display: block;float:left;margin-left:5px; cursor: pointer; font: 13px Arial;border: 1px solid #85BEE5;background-color: #e1effe;padding: 2px 5px;height: 16px;}
ul#popMenu li.active{background-color: #fff;border-bottom: 1px solid #fff;position: relative;}
div#popCityCon{border-top: 1px solid #85BEE5;margin-top: -1px;padding: 5px 0;}
div#popCityCon div{display: none;}
div#popCityCon div.active{display: block;}
div#popCityCon dl{overflow: hidden;margin:2px 0;overflow: hidden;}
div#popCityCon dt{float: left;width: 50px;text-align: center;color: #666;}
div#popCityCon dd{float: left;width: 350px;}
div#popCityCon a{ cursor: pointer;padding: 2px 5px;color: #3b5998;display: inline-block;}
div#popCityCon a:hover{background-color: orange;color: #fff;}
div#popCityCon a.active{background-color: orange;color: #fff;}
div#popCityCon div.active{display: block;} /*搜索提示框*/
#popList{ visibility: visible;border: 1px solid #ccc;font: 14px Arial;background-color: #fff;position: absolute;}
#popList ul{width: 100%;list-style-type: none;}
#popList ul li{padding: 5px;}
#popList ul li:hover{background-color: #ececec;cursor:default; }
#popList ul li.active{background-color: #ececec;cursor:default; }
</style>
</head>
<body> <input type="text" class="cityinput" id="city1" value="城市名">
<br/> <select name="IE6">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<select name="IE6">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<select name="IE6" >
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<select name="IE6" >
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<select name="IE6">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<select name="IE6">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<select name="IE6">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<select name="IE6">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<input type="text" class="cityinput" id="city2" value="城市名">
<select name="IE6" >
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<select name="IE6" >
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<br/>
<select name="IE6">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<select name="IE6">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<select name="IE6">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<select name="IE6">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<select name="IE6" >
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<select name="IE6" >
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<select name="IE6">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<select name="IE6">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<br/>
<select name="IE6">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<select name="IE6">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<select name="IE6">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<br/>
<select name="IE6">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<select name="IE6">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<select name="IE6">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<br/>
<select name="IE6">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<select name="IE6">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<select name="IE6">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<br/>
<select name="IE6">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<select name="IE6">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<select name="IE6">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<br/>
<select name="IE6">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<select name="IE6">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<select name="IE6">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<br/>
<select name="IE6">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<select name="IE6">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<select name="IE6">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<br/>
<select name="IE6">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<select name="IE6">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<select name="IE6">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<br/>
<select name="IE6">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<select name="IE6">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<select name="IE6">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<br/>
<select name="IE6">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<select name="IE6">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<select name="IE6">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<br/>
<select name="IE6">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<select name="IE6">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<select name="IE6">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<br/>
<select name="IE6">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<select name="IE6">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<select name="IE6">
<option>1</option>
<option>2</option>
<option>3</option>
</select>
<script type="text/javascript">
var _CalF = {
$ : function(object){//选择器
if(object === undefined ) return;
var getArr = function(name,tagName,attr){
var tagName = tagName || '*',
eles = document.getElementsByTagName(tagName),
clas = (typeof document.body.style.maxHeight === "undefined") ? "className" : "class";//ie6
attr = attr || clas,
Arr = [];
for(var i=0;i<eles.length;i++){
if(eles[i].getAttribute(attr)==name){
Arr.push(eles[i]);
}
}
return Arr;
}; if(object.indexOf('#') === 0){ //#id
return document.getElementById(object.substring(1));
}else if(object.indexOf('.') === 0){ //.class
return getArr(object.substring(1));
}else if(object.match(/=/g)){ //attr=name
return getArr(object.substring(object.search(/=/g)+1),null,object.substring(0,object.search(/=/g)));
}else if(object.match(/./g)){ //tagName.className
return getArr(object.split('.')[1],object.split('.')[0]);
}
},
addHandler:function(node, type, handler){
node.addEventListener ? node.addEventListener(type, handler, false) : node.attachEvent('on'+ type, handler);
},
removeHandler: function (node, type, handler) {
node.removeEventListener ? node.removeEventListener(type, handler, false) : node.detachEvent("on" + type, handler);
},
getPosition : function(obj) { //获取元素在页面里的位置和宽高
var top = 0,
left = 0,
width = obj.offsetWidth,
height = obj.offsetHeight; while(obj.offsetParent){
top += obj.offsetTop;
left += obj.offsetLeft;
obj = obj.offsetParent;
} return {"top":top,"left":left,"width":width,"height":height};
},
addClass:function(c,node){ // 添加样式名
node.className = node.className + ' ' + c;
},
removeClass:function(c,node){ // 移除样式名
var reg = new RegExp("(^|\\s+)" + c + "(\\s+|$)","g");
node.className = node.className.replace(reg, '');
},
stopPropagation:function(event){ // 阻止冒泡
var event = event || window.event;
event.stopPropagation ? event.stopPropagation() : event.cancelBubble = true;
},
getStyle : function(obj, attr){ //获取css属性
if(obj.currentStyle){
return obj.currentStyle[attr];
}else{
return getComputedStyle(obj, false)[attr];
}
},
ie6 : function(){
return !!window.ActiveXObject && !window.XMLHttpRequest;
} }; var cityData = ['北京|beijing|bj','上海|shanghai|sh', '重庆|chongqing|cq', '深圳|shenzhen|sz', '广州|guangzhou|gz', '杭州|hangzhou|hz',
'南京|nanjing|nj', '苏州|shuzhou|sz', '天津|tianjin|tj', '成都|chengdu|cd', '南昌|nanchang|nc', '三亚|sanya|sy','青岛|qingdao|qd',
'厦门|xiamen|xm', '西安|xian|xa','长沙|changsha|cs','合肥|hefei|hf','*|xizang|xz', '内蒙古|neimenggu|nmg', '安庆|anqing|aq', '阿泰勒|ataile|atl', '安康|ankang|ak',
'阿克苏|akesu|aks', '包头|baotou|bt', '北海|beihai|bh', '百色|baise|bs','保山|baoshan|bs', '长治|changzhi|cz', '长春|changchun|cc', '常州|changzhou|cz', '昌都|changdu|cd',
'朝阳|chaoyang|cy', '常德|changde|cd', '长白山|changbaishan|cbs', '赤峰|chifeng|cf', '大同|datong|dt', '大连|dalian|dl', '达县|daxian|dx', '东营|dongying|dy', '大庆|daqing|dq', '丹东|dandong|dd',
'大理|dali|dl', '敦煌|dunhuang|dh', '鄂尔多斯|eerduosi|eeds', '恩施|enshi|es', '福州|fuzhou|fz', '阜阳|fuyang|fy', '贵阳|guiyang|gy',
'桂林|guilin|gl', '广元|guangyuan|gy', '格尔木|geermu|gem', '呼和浩特|huhehaote|hhht', '哈密|hami|hm',
'黑河|heihe|hh', '海拉尔|hailaer|hle', '哈尔滨|haerbin|heb', '海口|haikou|hk', '黄山|huangshan|hs', '邯郸|handan|hd',
'汉中|hanzhong|hz', '和田|hetian|ht', '晋江|jinjiang|jj', '锦州|jinzhou|jz', '景德镇|jingdezhen|jdz',
'嘉峪关|jiayuguan|jyg', '井冈山|jinggangshan|jgs', '济宁|jining|jn', '九江|jiujiang|jj', '佳木斯|jiamusi|jms', '济南|jinan|jn',
'喀什|kashi|ks', '昆明|kunming|km', '康定|kangding|kd', '克拉玛依|kelamayi|klmy', '库尔勒|kuerle|kel', '库车|kuche|kc', '兰州|lanzhou|lz',
'洛阳|luoyang|ly', '丽江|lijiang|lj', '林芝|linzhi|lz', '柳州|liuzhou|lz', '泸州|luzhou|lz', '连云港|lianyungang|lyg', '黎平|liping|lp',
'连成|liancheng|lc', '拉萨|lasa|ls', '临沧|lincang|lc', '临沂|linyi|ly', '芒市|mangshi|ms', '牡丹江|mudanjiang|mdj', '满洲里|manzhouli|mzl', '绵阳|mianyang|my',
'梅县|meixian|mx', '漠河|mohe|mh', '南充|nanchong|nc', '南宁|nanning|nn', '南阳|nanyang|ny', '南通|nantong|nt', '那拉提|nalati|nlt',
'宁波|ningbo|nb', '攀枝花|panzhihua|pzh', '衢州|quzhou|qz', '秦皇岛|qinhuangdao|qhd', '庆阳|qingyang|qy', '齐齐哈尔|qiqihaer|qqhe',
'石家庄|shijiazhuang|sjz', '沈阳|shenyang|sy', '思茅|simao|sm', '铜仁|tongren|tr', '塔城|tacheng|tc', '腾冲|tengchong|tc', '台州|taizhou|tz',
'通辽|tongliao|tl', '太原|taiyuan|ty', '威海|weihai|wh', '梧州|wuzhou|wz', '文山|wenshan|ws', '无锡|wuxi|wx', '潍坊|weifang|wf', '武夷山|*shan|wys', '乌兰浩特|wulanhaote|wlht',
'温州|wenzhou|wz', '乌鲁木齐|wulumuqi|wlmq', '万州|wanzhou|wz', '乌海|wuhai|wh', '兴义|xingyi|xy', '西昌|xichang|xc', '襄樊|xiangfan|xf',
'西宁|xining|xn', '锡林浩特|xilinhaote|xlht', '西双版纳|xishuangbanna|xsbn', '徐州|xuzhou|xz', '义乌|yiwu|yw', '永州|yongzhou|yz', '榆林|yulin|yl', '延安|yanan|ya', '运城|yuncheng|yc',
'烟台|yantai|yt', '银川|yinchuan|yc', '宜昌|yichang|yc', '宜宾|yibin|yb', '盐城|yancheng|yc', '延吉|yanji|yj', '玉树|yushu|ys', '伊宁|yining|yn', '珠海|zhuhai|zh', '昭通|zhaotong|zt',
'张家界|zhangjiajie|zjj', '舟山|zhoushan|zs', '郑州|zhengzhou|zz', '中卫|zhongwei|zw', '芷江|zhijiang|zj', '湛江|zhanjiang|zj']; var iCity = {
inputSelector : function(id){ //input添加点击事件
var input =document.getElementById(id);
_CalF.addHandler(input,'click',function(){
iCity.input = input;
popList.style.visibility = "hidden";
iCity.outClick();
iCity.aClick();
iCity.getPosition();
});
_CalF.addHandler(input,'keyup',function(event){
var event = event || window.event,
keycode = event.keyCode;
popCity.style.visibility = "hidden";
iCity.createUL();
});
},
_temp : [
"<h1>选择城市(支持汉字/拼音/拼音缩写)</h1>",
"<ul id='popMenu'>",
"<li class='active'>热门城市</li>",
"<li>ABCDEFG</li>",
"<li>HIGHLMN</li>",
"<li>OPQRSTU</li>",
"<li>VWXYZ</li>",
"</ul>",
"<div id='popCityCon'></div>"
],
cityClass : function(){ //城市分类
if(!this.citys){
//{HOT:{hot:[],ABCDEFG:{a:[1,2,3],b:[1,2,3]},HIGHLMN:{},OPQRSTU:{},VWXYZ:{}}
this.citys = {"hotCity":[],"ABCDEFG":{},"HIGHLMN":{},"OPQRSTU":{},"VWXYZ":{}};
var make,fn,name,
reg1 = /^[a-g]$/i, reg2 = /^[h-n]$/i, reg3 = /^[o-u]$/i,reg4 = /^[v-z]$/i; for(i in cityData){
make = cityData[i].split("|"); //分割成数组
fn = make[2].substring(0,1).toUpperCase(); //获取英文第一个字母转换成大写
name = make[0];
if(reg1.test(fn)){
if(!this.citys.ABCDEFG[fn]) this.citys.ABCDEFG[fn]=[];
this.citys.ABCDEFG[fn].push(name)
}else if(reg2.test(fn)){
if(!this.citys.HIGHLMN[fn]) this.citys.HIGHLMN[fn]=[];
this.citys.HIGHLMN[fn].push(name)
}else if(reg3.test(fn)){
if(!this.citys.OPQRSTU[fn]) this.citys.OPQRSTU[fn]=[];
this.citys.OPQRSTU[fn].push(name)
}else if(reg4.test(fn)){
if(!this.citys.VWXYZ[fn]) this.citys.VWXYZ[fn]=[];
this.citys.VWXYZ[fn].push(name)
} if(i<20){
if(!this.citys.hotCity["HOT"]) this.citys.hotCity["HOT"]=[];
this.citys.hotCity["HOT"].push(name);
}
} }
},
creatDiv : function(){
var popCity = document.createElement("div"); //城市div
popCity.id = "popCity";
popCity.innerHTML = this._temp.join("");
_CalF.addHandler(popCity,"click", _CalF.stopPropagation); //阻止事件冒泡 var popList = document.createElement("div"); //输入提示div
_CalF.addHandler(popList,"click", _CalF.stopPropagation); //阻止事件冒泡
popList.id="popList"; document.body.appendChild(popCity);
document.body.appendChild(popList);
this.popCity = popCity;
this.popList = popList;
},
getData :function(){
this.creatDiv();
this.cityClass();
var i,div,arr,dl,dt,dd,_tempDD,
popCityCon = _CalF.$("#popCityCon"),
data = this.citys; for(var i in data){
div = document.createElement("div");
div.id = i;
if(div.id=="hotCity") div.className ="active";
arr=[]; for(var b in data[i]){
arr.push(b);
arr.sort();
} for(var c in arr){
dl = document.createElement("dl");
dt = document.createElement("dt");
dd = document.createElement("dd");
dt.innerHTML = arr[c]; _tempDD = [];
for(var d in data[i][arr[c]]){
_tempDD.push("<a>"+data[i][arr[c]][d]+"</a>");
}
dd.innerHTML = _tempDD.join(""); dl.appendChild(dt);
dl.appendChild(dd);
div.appendChild(dl);
} popCityCon.appendChild(div);
}
if(_CalF.ie6()){
popCityCon.appendChild(this.createIframe());
this.aHover();
}
this.tabClick();
},
tabClick : function(){
var index,
popMenu = _CalF.$("#popMenu"),
popCityCon = _CalF.$("#popCityCon"),
myIframe = _CalF.$("#myIframe"),
popCity = _CalF.$("#popCity"),
lis = popMenu.getElementsByTagName("li"),
divs = popCityCon.getElementsByTagName("div");
for(var i=0;i<lis.length;i++){
lis[i].index = i;
lis[i].onclick = function(){
for(var j=0;j<i;j++){
_CalF.removeClass("active",lis[j]);
_CalF.removeClass("active",divs[j]);
}
_CalF.addClass("active",this);
_CalF.addClass("active",divs[this.index]);
if(_CalF.ie6()){myIframe.style.height = popCity.offsetHeight + 'px';};
}
}
},
aClick : function(){
var that = this,
popCityCon = _CalF.$("#popCityCon"),
links = popCityCon.getElementsByTagName("a");
for(var i in links){
links[i].onclick = function(){
that.input.value = this.innerHTML;
that.popCity.style.visibility = "hidden";
}
}
},
aHover : function(){
var that = this,
popCityCon = _CalF.$("#popCityCon"),
links = popCityCon.getElementsByTagName("a");
for(var i in links){
links[i].onmouseover = function(){_CalF.addClass("active",this)}
links[i].onmouseout = function(){_CalF.removeClass("active",this)}
}
},
liClick :function(){
var that = this,
popList = that.popList,
lis = popList.getElementsByTagName("li");
for(var i=0, len = lis.length; i<len; i++){
lis[i].onclick = function(){
that.input.value = this.innerHTML;
that.popList.style.visibility = "hidden";
}
}
},
liHover :function(){
var that = this,
popList = that.popList,
lis = popList.getElementsByTagName("li");
for(var i=0, len = lis.length; i<len; i++){
lis[i].onmouseover = function(){_CalF.addClass("active",this)}
lis[i].onmouseout = function(){_CalF.removeClass("active",this)}
}
},
getPosition : function(){
var Pos = _CalF.getPosition(iCity.input);
popCity.style.top = Pos.top + Pos.height + "px";
popCity.style.left = Pos.left + "px";
popCity.style.visibility = "visible"; popList.style.top = Pos.top + Pos.height + "px";
popList.style.left = Pos.left + "px";
popList.style.width = Pos.width + "px";
},
createIframe : function(){ //ie6创建iframe遮罩
var myIframe = document.createElement('iframe');
myIframe.id = 'myIframe';
myIframe.style.position = 'absolute';
myIframe.style.zIndex = '-1';
myIframe.style.left = '-1px';
myIframe.style.top = 0;
myIframe.style.border = 0;
myIframe.style.filter = 'alpha(opacity= 0 )';
myIframe.style.width = this.popCity.offsetWidth + 'px';
myIframe.style.height = this.popCity.offsetHeight + 'px';
this.myIframe = myIframe;
return myIframe;
},
createIframe2 : function(){ //ie6创建iframe遮罩
var myIframe2 = document.createElement('iframe');
myIframe2.id = 'myIframe2';
myIframe2.style.position = 'absolute';
myIframe2.style.zIndex = '-1';
myIframe2.style.left = '-1px';
myIframe2.style.top = 0;
myIframe2.style.border = 0;
myIframe2.style.filter = 'alpha(opacity= 0 )';
myIframe2.style.width = this.popList.offsetWidth + 'px';
myIframe2.style.height = this.popList.offsetHeight + 'px';
return myIframe2;
},
createUL : function(){
var value = this.input.value,
popList = this.popList;
if(value !==""){
var ul = document.createElement('ul'),
searchResult = [],
reg = new RegExp("^" + value + "|\\|" + value, 'gi'),
make,str;
searchResult.push("<ul>");
for(var i in cityData){
if(reg.test(cityData[i])){ //含有字符串
make = cityData[i].split("|"); //分割成数组
str = "<li>"+make[0]+"</li>";
searchResult.push(str);
}
}
searchResult.push("</ul>"); if(searchResult.length>2){
popList.innerHTML = searchResult.join("");
if(_CalF.ie6()){
popList.appendChild(this.createIframe2());
this.liHover();
};
this.liClick();
popList.style.visibility = "visible";
} }else{
popList.style.visibility = "hidden";
}
},
outClick:function(){ //鼠标在对象区域外点击隐藏
var that = this;
_CalF.addHandler(document, 'click',function(event){
var event = event || window.event,
target = event.target || event.srcElement;
if(target == that.input || target==that.popCity || target==that.popList) return;
that.popCity.style.visibility = "hidden";
that.popList.style.visibility = "hidden";
});
} }; iCity.getData();
var input1 = iCity.inputSelector("city1");
var input2 = iCity.inputSelector("city2");
</script>
</body>
</html>