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JavaScript實(shí)現(xiàn)城市選擇控件的效果

在淘寶旅行上看到的城市選擇效果，感覺還不錯(cuò)，就自己的理解重新實(shí)現(xiàn)一遍，先看效果（有人說IE9下面有BUG，LZ用的是落后的XP，居然裝不上IE9，去公司在搞搞好了），然后再細(xì)說實(shí)現(xiàn)原理，支持鼠標(biāo)上下鍵選擇城市，支持直接輸入城市名稱，拼音首字母，全拼，支持IE6遮蓋SELECT，壓縮后12K。

實(shí)現(xiàn)的步驟：

一、先用一定的格式羅列出控件所需要的城市以及拼音等，我這里是按照如下格式羅列成一個(gè)數(shù)組, 如果需要增加城市，直接增加在數(shù)組里面即可：

城市我是一個(gè)一個(gè)手打的。。。

二、因?yàn)榭丶某鞘蟹纸M按好幾類劃分，比如：按首字母HOT 、ABCDEFH 、 IJKLMNOP 、 QRSTUVWXYZ 四組劃分，

而劃分了四組后又按照了首字母劃分，所以我用正則表達(dá)式和循環(huán)把數(shù)組重新格式化為一個(gè)分組對(duì)象，熱門城市取前16條。

對(duì)象格式如下：

{HOT:{hot:[]},ABCDEFGH:{a:[1,2,3],b:[1,2,3]},IJKLMNOP:{i:[1.2.3],j:[1,2,3]},QRSTUVWXYZ:{}}

所用代碼如下：

/* * 
 * 格式化城市數(shù)組為對(duì)象oCity，按照a-h,i-p,q-z,hot熱門城市分組： 
 * {HOT:{hot:[]},ABCDEFGH:{a:[1,2,3],b:[1,2,3]},IJKLMNOP:{i:[1.2.3],j:[1,2,3]},QRSTUVWXYZ:{}} 
 * */ 
 
(function () { 
 var citys = Vcity.allCity, match, letter, 
  regEx = Vcity.regEx, 
  reg2 = /^[a-h]$/i, reg3 = /^[i-p]$/i, reg4 = /^[q-z]$/i; 
 if (!Vcity.oCity) { 
  Vcity.oCity = {hot:{},ABCDEFGH:{}, IJKLMNOP:{}, QRSTUVWXYZ:{}}; 
  //console.log(citys.length); 
  for (var i = 0, n = citys.length; i  n; i++) { 
   match = regEx.exec(citys[i]); 
   letter = match[3].toUpperCase(); 
   if (reg2.test(letter)) { 
    if (!Vcity.oCity.ABCDEFGH[letter]) Vcity.oCity.ABCDEFGH[letter] = []; 
    Vcity.oCity.ABCDEFGH[letter].push(match[1]); 
   } else if (reg3.test(letter)) { 
    if (!Vcity.oCity.IJKLMNOP[letter]) Vcity.oCity.IJKLMNOP[letter] = []; 
    Vcity.oCity.IJKLMNOP[letter].push(match[1]); 
   } else if (reg4.test(letter)) { 
    if (!Vcity.oCity.QRSTUVWXYZ[letter]) Vcity.oCity.QRSTUVWXYZ[letter] = []; 
    Vcity.oCity.QRSTUVWXYZ[letter].push(match[1]); 
   } 
   /* 熱門城市 前16條 */ 
   if(i16){ 
    if(!Vcity.oCity.hot['hot']) Vcity.oCity.hot['hot'] = []; 
    Vcity.oCity.hot['hot'].push(match[1]); 
   } 
  } 
 } 
})();

三、然后先照著淘寶旅行里面的樣子弄出HTML與CSS；這里略過。

四、然后開始建立CitySelector構(gòu)造函數(shù)，根據(jù)城市對(duì)象，構(gòu)建生成DOM對(duì)象，在按照相應(yīng)的事件觸發(fā)。在生成相應(yīng)的按照A\B\C\D……分組的時(shí)候遇到一個(gè)

關(guān)于排序的問題，我的對(duì)象格式是這樣的ABCDEFGH:{a:[1,2,3],b:[1,2,3],c:[1,2,3]},里面的小數(shù)組要按照字母的順序排序，但是我用for……in循環(huán)生成

出來是亂的，咨詢了群里的高人后，處理方法如下：這里單獨(dú)把KEY拿出來組成一個(gè)數(shù)組，然后排序后，在根據(jù)數(shù)組的值作為KEY值，來讀取對(duì)象！

sortKey=[]; 
   for(ckey in oCity[key]){ 
    sortKey.push(ckey); 
    // ckey按照ABCDEDG順序排序 
    sortKey.sort(); 
   } 
   for(var j=0,k = sortKey.length;jk;j++){ 
    odl = document.createElement('dl'); 
    odt = document.createElement('dt'); 
    odd = document.createElement('dd'); 
    odt.innerHTML = sortKey[j] == 'hot'?'nbsp;':sortKey[j]; 
    odda = []; 
    for(var i=0,n=oCity[key][sortKey[j]].length;in;i++){ 
     str = 'a href="#">' + oCity[key][sortKey[j]][i] + '/a>'; 
     odda.push(str); 
    }

五、鼠標(biāo)上下鍵移動(dòng)選擇城市的處理方法：在城市彈出后記錄一個(gè)this.count = 0；然后再獲取上下鍵的按鍵事件中分別對(duì)count值加一或者減一，

當(dāng)然count的最大值不能大于篩選出來的城市數(shù)組的長(zhǎng)度，超過長(zhǎng)度后歸0，小于0后賦值最大值，然后把this.count的值，來作為數(shù)組的標(biāo)獲取相應(yīng)的城市項(xiàng)：

switch(keycode){ 
   case 40: //向下箭頭↓ 
    this.count++; 
    if(this.count > len-1) this.count = 0; 
    for(var i=0;ilen;i++){ 
     Vcity._m.removeClass('on',lis[i]); 
    } 
    Vcity._m.addClass('on',lis[this.count]); 
    break; 
   case 38: //向上箭頭↑ 
    this.count--; 
    if(this.count0) this.count = len-1; 
    for(i=0;ilen;i++){ 
     Vcity._m.removeClass('on',lis[i]); 
    } 
    Vcity._m.addClass('on',lis[this.count]); 
    break; 
   case 13: // enter鍵 
    this.input.value = Vcity.regExChiese.exec(lis[this.count].innerHTML)[0]; 
    Vcity._m.addClass('hide',this.ul); 
    Vcity._m.addClass('hide',this.ul); 
    /* IE6 */ 
    Vcity._m.addClass('hide',this.myIframe); 
    break; 
   default: 
    break; 
  }

六、IE中對(duì)SELECT的遮擋也是一個(gè)增加代碼的地方，因?yàn)槌鞘袕棾隹虻拇笮∈亲兓?，然后下拉的城市列也是根?jù)篩選出來的值而變化，所以得每操作一個(gè)變化的地方的時(shí)候就重新給iframe設(shè)置長(zhǎng)度和寬度，苦逼的處理方法啊，所以就多了這樣一個(gè)方法，然后在改變尺寸的時(shí)候，應(yīng)用一下就可以了。

/* IE6的改變遮罩SELECT 的 IFRAME尺寸大小 */ 
 changeIframe:function(){ 
  if(!this.isIE6)return; 
  this.myIframe.style.width = this.rootDiv.offsetWidth + 'px'; 
  this.myIframe.style.height = this.rootDiv.offsetHeight + 'px'; 
 }

7、彈出框的取消問題，這個(gè)問題最開始我是設(shè)置document的click事件關(guān)閉層，然后再?gòu)棾龅膶由献柚筩lick事件的冒泡，但是這樣兩個(gè)層有同時(shí)出現(xiàn)的可能，

// 設(shè)置點(diǎn)擊文檔隱藏彈出的城市選擇框 
  Vcity._m.on(document, 'click', function (event) { 
   event = Vcity._m.getEvent(event); 
   var target = Vcity._m.getTarget(event); 
   if(target == that.input) return false; 
   //console.log(target.className); 
   if (that.cityBox)Vcity._m.addClass('hide', that.cityBox); 
   if (that.ul)Vcity._m.addClass('hide', that.ul); 
   if(that.myIframe)Vcity._m.addClass('hide',that.myIframe); 
  });

8、輸入框輸入拼音或者文字或者拼音首字母篩選城市，這個(gè)就是直接用正則表達(dá)式在最開始的數(shù)組里面篩選數(shù)據(jù)即可：

var reg = new RegExp("^" + value + "|\\|" + value, 'gi');    
   var searchResult = []; 
   for (var i = 0, n = Vcity.allCity.length; i  n; i++) { 
    if (reg.test(Vcity.allCity[i])) { 
     var match = Vcity.regEx.exec(Vcity.allCity[i]); 
     if (searchResult.length !== 0) { 
      str = 'li>b class="cityname">' + match[1] + '/b>b class="cityspell">' + match[2] + '/b>/li>'; 
     } else { 
      str = 'li class="on">b class="cityname">' + match[1] + '/b>b class="cityspell">' + match[2] + '/b>/li>'; 
     } 
     searchResult.push(str); 
    } 
   }

然后總的JS代碼如下：

/* * 
 * ---------------------------------------- * 
 * 城市選擇組件 v1.0 
 * Author: VVG 
 * QQ: 83816819 
 * Mail: mysheller@163.com 
 * http://www.cnblogs.com/NNUF/ 
 * ---------------------------------------- * 
 * Date: 2012-07-10 
 * ---------------------------------------- * 
 * */ 
 
/* * 
 * 全局空間 Vcity 
 * */ 
var Vcity = {}; 
/* * 
 * 靜態(tài)方法集 
 * @name _m 
 * */ 
Vcity._m = { 
 /* 選擇元素 */ 
 $:function (arg, context) { 
  var tagAll, n, eles = [], i, sub = arg.substring(1); 
  context = context || document; 
  if (typeof arg == 'string') { 
   switch (arg.charAt(0)) { 
    case '#': 
     return document.getElementById(sub); 
     break; 
    case '.': 
     if (context.getElementsByClassName) return context.getElementsByClassName(sub); 
     tagAll = Vcity._m.$('*', context); 
     n = tagAll.length; 
     for (i = 0; i  n; i++) { 
      if (tagAll[i].className.indexOf(sub) > -1) eles.push(tagAll[i]); 
     } 
     return eles; 
     break; 
    default: 
     return context.getElementsByTagName(arg); 
     break; 
   } 
  } 
 }, 
 
 /* 綁定事件 */ 
 on:function (node, type, handler) { 
  node.addEventListener ? node.addEventListener(type, handler, false) : node.attachEvent('on' + type, handler); 
 }, 
 
 /* 獲取事件 */ 
 getEvent:function(event){ 
  return event || window.event; 
 }, 
 
 /* 獲取事件目標(biāo) */ 
 getTarget:function(event){ 
  return event.target || event.srcElement; 
 }, 
 
 /* 獲取元素位置 */ 
 getPos:function (node) { 
  var scrollx = document.documentElement.scrollLeft || document.body.scrollLeft, 
   scrollt = document.documentElement.scrollTop || document.body.scrollTop; 
  var pos = node.getBoundingClientRect(); 
  return {top:pos.top + scrollt, right:pos.right + scrollx, bottom:pos.bottom + scrollt, left:pos.left + scrollx } 
 }, 
 
 /* 添加樣式名 */ 
 addClass:function (c, node) { 
  if(!node)return; 
  node.className = Vcity._m.hasClass(c,node) ? node.className : node.className + ' ' + c ; 
 }, 
 
 /* 移除樣式名 */ 
 removeClass:function (c, node) { 
  var reg = new RegExp("(^|\\s+)" + c + "(\\s+|$)", "g"); 
  if(!Vcity._m.hasClass(c,node))return; 
  node.className = reg.test(node.className) ? node.className.replace(reg, '') : node.className; 
 }, 
 
 /* 是否含有CLASS */ 
 hasClass:function (c, node) { 
  if(!node || !node.className)return false; 
  return node.className.indexOf(c)>-1; 
 }, 
 
 /* 阻止冒泡 */ 
 stopPropagation:function (event) { 
  event = event || window.event; 
  event.stopPropagation ? event.stopPropagation() : event.cancelBubble = true; 
 }, 
 /* 去除兩端空格 */ 
 trim:function (str) { 
  return str.replace(/^\s+|\s+$/g,''); 
 } 
}; 
 
/* 所有城市數(shù)據(jù),可以按照格式自行添加（北京|beijing|bj），前16條為熱門城市 */ 
 
Vcity.allCity = ['北京|beijing|bj','上海|shanghai|sh', '重慶|chongqing|cq', '深圳|shenzhen|sz', '廣州|guangzhou|gz', '杭州|hangzhou|hz', 
 '南京|nanjing|nj', '蘇州|shuzhou|sz', '天津|tianjin|tj', '成都|chengdu|cd', '南昌|nanchang|nc', '三亞|sanya|sy','青島|qingdao|qd', 
 '廈門|xiamen|xm', '西安|xian|xa','長(zhǎng)沙|changsha|cs','合肥|hefei|hf','西藏|xizang|xz', '內(nèi)蒙古|neimenggu|nmg', '安慶|anqing|aq', '阿泰勒|ataile|atl', '安康|ankang|ak', 
 '阿克蘇|akesu|aks', '包頭|baotou|bt', '北海|beihai|bh', '百色|baise|bs','保山|baoshan|bs', '長(zhǎng)治|changzhi|cz', '長(zhǎng)春|changchun|cc', '常州|changzhou|cz', '昌都|changdu|cd', 
 '朝陽(yáng)|chaoyang|cy', '常德|changde|cd', '長(zhǎng)白山|changbaishan|cbs', '赤峰|chifeng|cf', '大同|datong|dt', '大連|dalian|dl', '達(dá)縣|daxian|dx', '東營(yíng)|dongying|dy', '大慶|daqing|dq', '丹東|dandong|dd', 
 '大理|dali|dl', '敦煌|dunhuang|dh', '鄂爾多斯|eerduosi|eeds', '恩施|enshi|es', '福州|fuzhou|fz', '阜陽(yáng)|fuyang|fy', '貴陽(yáng)|guiyang|gy', 
 '桂林|guilin|gl', '廣元|guangyuan|gy', '格爾木|geermu|gem', '呼和浩特|huhehaote|hhht', '哈密|hami|hm', 
 '黑河|heihe|hh', '海拉爾|hailaer|hle', '哈爾濱|haerbin|heb', '海口|haikou|hk', '黃山|huangshan|hs', '邯鄲|handan|hd', 
 '漢中|hanzhong|hz', '和田|hetian|ht', '晉江|jinjiang|jj', '錦州|jinzhou|jz', '景德鎮(zhèn)|jingdezhen|jdz', 
 '嘉峪關(guān)|jiayuguan|jyg', '井岡山|jinggangshan|jgs', '濟(jì)寧|jining|jn', '九江|jiujiang|jj', '佳木斯|jiamusi|jms', '濟(jì)南|jinan|jn', 
 '喀什|kashi|ks', '昆明|kunming|km', '康定|kangding|kd', '克拉瑪依|kelamayi|klmy', '庫(kù)爾勒|kuerle|kel', '庫(kù)車|kuche|kc', '蘭州|lanzhou|lz', 
 '洛陽(yáng)|luoyang|ly', '麗江|lijiang|lj', '林芝|linzhi|lz', '柳州|liuzhou|lz', '瀘州|luzhou|lz', '連云港|lianyungang|lyg', '黎平|liping|lp', 
 '連成|liancheng|lc', '拉薩|lasa|ls', '臨滄|lincang|lc', '臨沂|linyi|ly', '芒市|mangshi|ms', '牡丹江|mudanjiang|mdj', '滿洲里|manzhouli|mzl', '綿陽(yáng)|mianyang|my', 
 '梅縣|meixian|mx', '漠河|mohe|mh', '南充|nanchong|nc', '南寧|nanning|nn', '南陽(yáng)|nanyang|ny', '南通|nantong|nt', '那拉提|nalati|nlt', 
 '寧波|ningbo|nb', '攀枝花|panzhihua|pzh', '衢州|quzhou|qz', '秦皇島|qinhuangdao|qhd', '慶陽(yáng)|qingyang|qy', '齊齊哈爾|qiqihaer|qqhe', 
 '石家莊|shijiazhuang|sjz', '沈陽(yáng)|shenyang|sy', '思茅|simao|sm', '銅仁|tongren|tr', '塔城|tacheng|tc', '騰沖|tengchong|tc', '臺(tái)州|taizhou|tz', 
 '通遼|tongliao|tl', '太原|taiyuan|ty', '威海|weihai|wh', '梧州|wuzhou|wz', '文山|wenshan|ws', '無錫|wuxi|wx', '濰坊|weifang|wf', '武夷山|wuyishan|wys', '烏蘭浩特|wulanhaote|wlht', 
 '溫州|wenzhou|wz', '烏魯木齊|wulumuqi|wlmq', '萬州|wanzhou|wz', '烏海|wuhai|wh', '興義|xingyi|xy', '西昌|xichang|xc', '襄樊|xiangfan|xf', 
 '西寧|xining|xn', '錫林浩特|xilinhaote|xlht', '西雙版納|xishuangbanna|xsbn', '徐州|xuzhou|xz', '義烏|yiwu|yw', '永州|yongzhou|yz', '榆林|yulin|yl', '延安|yanan|ya', '運(yùn)城|yuncheng|yc', 
 '煙臺(tái)|yantai|yt', '銀川|yinchuan|yc', '宜昌|yichang|yc', '宜賓|yibin|yb', '鹽城|yancheng|yc', '延吉|yanji|yj', '玉樹|yushu|ys', '伊寧|yining|yn', '珠海|zhuhai|zh', '昭通|zhaotong|zt', 
 '張家界|zhangjiajie|zjj', '舟山|zhoushan|zs', '鄭州|zhengzhou|zz', '中衛(wèi)|zhongwei|zw', '芷江|zhijiang|zj', '湛江|zhanjiang|zj']; 
 
/* 正則表達(dá)式 篩選中文城市名、拼音、首字母 */ 
 
Vcity.regEx = /^([\u4E00-\u9FA5\uf900-\ufa2d]+)\|(\w+)\|(\w)\w*$/i; 
Vcity.regExChiese = /([\u4E00-\u9FA5\uf900-\ufa2d]+)/; 
 
/* * 
 * 格式化城市數(shù)組為對(duì)象oCity，按照a-h,i-p,q-z,hot熱門城市分組： 
 * {HOT:{hot:[]},ABCDEFGH:{a:[1,2,3],b:[1,2,3]},IJKLMNOP:{i:[1.2.3],j:[1,2,3]},QRSTUVWXYZ:{}} 
 * */ 
 
(function () { 
 var citys = Vcity.allCity, match, letter, 
  regEx = Vcity.regEx, 
  reg2 = /^[a-h]$/i, reg3 = /^[i-p]$/i, reg4 = /^[q-z]$/i; 
 if (!Vcity.oCity) { 
  Vcity.oCity = {hot:{},ABCDEFGH:{}, IJKLMNOP:{}, QRSTUVWXYZ:{}}; 
  //console.log(citys.length); 
  for (var i = 0, n = citys.length; i  n; i++) { 
   match = regEx.exec(citys[i]); 
   letter = match[3].toUpperCase(); 
   if (reg2.test(letter)) { 
    if (!Vcity.oCity.ABCDEFGH[letter]) Vcity.oCity.ABCDEFGH[letter] = []; 
    Vcity.oCity.ABCDEFGH[letter].push(match[1]); 
   } else if (reg3.test(letter)) { 
    if (!Vcity.oCity.IJKLMNOP[letter]) Vcity.oCity.IJKLMNOP[letter] = []; 
    Vcity.oCity.IJKLMNOP[letter].push(match[1]); 
   } else if (reg4.test(letter)) { 
    if (!Vcity.oCity.QRSTUVWXYZ[letter]) Vcity.oCity.QRSTUVWXYZ[letter] = []; 
    Vcity.oCity.QRSTUVWXYZ[letter].push(match[1]); 
   } 
   /* 熱門城市 前16條 */ 
   if(i16){ 
    if(!Vcity.oCity.hot['hot']) Vcity.oCity.hot['hot'] = []; 
    Vcity.oCity.hot['hot'].push(match[1]); 
   } 
  } 
 } 
})(); 
/* 城市HTML模板 */ 
Vcity._template = [ 
 'p class="tip">熱門城市(支持漢字/拼音)/p>', 
 'ul>', 
 'li class="on">熱門城市/li>', 
 'li>ABCDEFGH/li>', 
 'li>IJKLMNOP/li>', 
 'li>QRSTUVWXYZ/li>', 
 '/ul>' 
]; 
 
/* * 
 * 城市控件構(gòu)造函數(shù) 
 * @CitySelector 
 * */ 
 
Vcity.CitySelector = function () { 
 this.initialize.apply(this, arguments); 
}; 
 
Vcity.CitySelector.prototype = { 
 
 constructor:Vcity.CitySelector, 
 
 /* 初始化 */ 
 
 initialize :function (options) { 
  var input = options.input; 
  this.input = Vcity._m.$('#'+ input); 
  this.inputEvent(); 
 }, 
 
 /* * 
  * @createWarp 
  * 創(chuàng)建城市BOX HTML 框架 
  * */ 
 
 createWarp:function(){ 
  var inputPos = Vcity._m.getPos(this.input); 
  var div = this.rootDiv = document.createElement('div'); 
  var that = this; 
 
  // 設(shè)置DIV阻止冒泡 
  Vcity._m.on(this.rootDiv,'click',function(event){ 
   Vcity._m.stopPropagation(event); 
  }); 
 
  // 設(shè)置點(diǎn)擊文檔隱藏彈出的城市選擇框 
  Vcity._m.on(document, 'click', function (event) { 
   event = Vcity._m.getEvent(event); 
   var target = Vcity._m.getTarget(event); 
   if(target == that.input) return false; 
   //console.log(target.className); 
   if (that.cityBox)Vcity._m.addClass('hide', that.cityBox); 
   if (that.ul)Vcity._m.addClass('hide', that.ul); 
   if(that.myIframe)Vcity._m.addClass('hide',that.myIframe); 
  }); 
  div.className = 'citySelector'; 
  div.style.position = 'absolute'; 
  div.style.left = inputPos.left + 'px'; 
  div.style.top = inputPos.bottom + 'px'; 
  div.style.zIndex = 999999; 
 
  // 判斷是否IE6，如果是IE6需要添加iframe才能遮住SELECT框 
  var isIe = (document.all) ? true : false; 
  var isIE6 = this.isIE6 = isIe  !window.XMLHttpRequest; 
  if(isIE6){ 
   var myIframe = this.myIframe = document.createElement('iframe'); 
   myIframe.frameborder = '0'; 
   myIframe.src = 'about:blank'; 
   myIframe.style.position = 'absolute'; 
   myIframe.style.zIndex = '-1'; 
   this.rootDiv.appendChild(this.myIframe); 
  } 
 
  var childdiv = this.cityBox = document.createElement('div'); 
  childdiv.className = 'cityBox'; 
  childdiv.id = 'cityBox'; 
  childdiv.innerHTML = Vcity._template.join(''); 
  var hotCity = this.hotCity = document.createElement('div'); 
  hotCity.className = 'hotCity'; 
  childdiv.appendChild(hotCity); 
  div.appendChild(childdiv); 
  this.createHotCity(); 
 }, 
 
 /* * 
  * @createHotCity 
  * TAB下面DIV：hot,a-h,i-p,q-z 分類HTML生成，DOM操作 
  * {HOT:{hot:[]},ABCDEFGH:{a:[1,2,3],b:[1,2,3]},IJKLMNOP:{},QRSTUVWXYZ:{}} 
  **/ 
 
 createHotCity:function(){ 
  var odiv,odl,odt,odd,odda=[],str,key,ckey,sortKey,regEx = Vcity.regEx, 
   oCity = Vcity.oCity; 
  for(key in oCity){ 
   odiv = this[key] = document.createElement('div'); 
   // 先設(shè)置全部隱藏hide 
   odiv.className = key + ' ' + 'cityTab hide'; 
   sortKey=[]; 
   for(ckey in oCity[key]){ 
    sortKey.push(ckey); 
    // ckey按照ABCDEDG順序排序 
    sortKey.sort(); 
   } 
   for(var j=0,k = sortKey.length;jk;j++){ 
    odl = document.createElement('dl'); 
    odt = document.createElement('dt'); 
    odd = document.createElement('dd'); 
    odt.innerHTML = sortKey[j] == 'hot'?'nbsp;':sortKey[j]; 
    odda = []; 
    for(var i=0,n=oCity[key][sortKey[j]].length;in;i++){ 
     str = 'a href="javascript:">' + oCity[key][sortKey[j]][i] + '/a>'; 
     odda.push(str); 
    } 
    odd.innerHTML = odda.join(''); 
    odl.appendChild(odt); 
    odl.appendChild(odd); 
    odiv.appendChild(odl); 
   } 
 
   // 移除熱門城市的隱藏CSS 
   Vcity._m.removeClass('hide',this.hot); 
   this.hotCity.appendChild(odiv); 
  } 
  document.body.appendChild(this.rootDiv); 
  /* IE6 */ 
  this.changeIframe(); 
 
  this.tabChange(); 
  this.linkEvent(); 
 }, 
 
 /* * 
  * tab按字母順序切換 
  * @ tabChange 
  * */ 
 
 tabChange:function(){ 
  var lis = Vcity._m.$('li',this.cityBox); 
  var divs = Vcity._m.$('div',this.hotCity); 
  var that = this; 
  for(var i=0,n=lis.length;in;i++){ 
   lis[i].index = i; 
   lis[i].onclick = function(){ 
    for(var j=0;jn;j++){ 
     Vcity._m.removeClass('on',lis[j]); 
     Vcity._m.addClass('hide',divs[j]); 
    } 
    Vcity._m.addClass('on',this); 
    Vcity._m.removeClass('hide',divs[this.index]); 
    /* IE6 改變TAB的時(shí)候 改變Iframe 大小*/ 
    that.changeIframe(); 
   }; 
  } 
 }, 
 
 /* * 
  * 城市LINK事件 
  * @linkEvent 
  * */ 
 
 linkEvent:function(){ 
  var links = Vcity._m.$('a',this.hotCity); 
  var that = this; 
  for(var i=0,n=links.length;in;i++){ 
   links[i].onclick = function(){ 
    that.input.value = this.innerHTML; 
    Vcity._m.addClass('hide',that.cityBox); 
    /* 點(diǎn)擊城市名的時(shí)候隱藏myIframe */ 
    Vcity._m.addClass('hide',that.myIframe); 
   } 
  } 
 }, 
 
 /* * 
  * INPUT城市輸入框事件 
  * @inputEvent 
  * */ 
 
 inputEvent:function(){ 
  var that = this; 
  Vcity._m.on(this.input,'click',function(event){ 
   event = event || window.event; 
   if(!that.cityBox){ 
    that.createWarp(); 
   }else if(!!that.cityBox  Vcity._m.hasClass('hide',that.cityBox)){ 
    // slideul 不存在或者 slideul存在但是是隱藏的時(shí)候 兩者不能共存 
    if(!that.ul || (that.ul  Vcity._m.hasClass('hide',that.ul))){ 
     Vcity._m.removeClass('hide',that.cityBox); 
 
     /* IE6 移除iframe 的hide 樣式 */ 
     //alert('click'); 
     Vcity._m.removeClass('hide',that.myIframe); 
     that.changeIframe(); 
    } 
   } 
  }); 
  Vcity._m.on(this.input,'focus',function(){ 
   that.input.select(); 
   if(that.input.value == '城市名') that.input.value = ''; 
  }); 
  Vcity._m.on(this.input,'blur',function(){ 
   if(that.input.value == '') that.input.value = '城市名'; 
  }); 
  Vcity._m.on(this.input,'keyup',function(event){ 
   event = event || window.event; 
   var keycode = event.keyCode; 
   Vcity._m.addClass('hide',that.cityBox); 
   that.createUl(); 
 
   /* 移除iframe 的hide 樣式 */ 
   Vcity._m.removeClass('hide',that.myIframe); 
 
   // 下拉菜單顯示的時(shí)候捕捉按鍵事件 
   if(that.ul  !Vcity._m.hasClass('hide',that.ul)  !that.isEmpty){ 
    that.KeyboardEvent(event,keycode); 
   } 
  }); 
 }, 
 
 /* * 
  * 生成下拉選擇列表 
  * @ createUl 
  * */ 
 
 createUl:function () { 
  //console.log('createUL'); 
  var str; 
  var value = Vcity._m.trim(this.input.value); 
  // 當(dāng)value不等于空的時(shí)候執(zhí)行 
  if (value !== '') { 
   var reg = new RegExp("^" + value + "|\\|" + value, 'gi'); 
   var searchResult = []; 
   for (var i = 0, n = Vcity.allCity.length; i  n; i++) { 
    if (reg.test(Vcity.allCity[i])) { 
     var match = Vcity.regEx.exec(Vcity.allCity[i]); 
     if (searchResult.length !== 0) { 
      str = 'li>b class="cityname">' + match[1] + '/b>b class="cityspell">' + match[2] + '/b>/li>'; 
     } else { 
      str = 'li class="on">b class="cityname">' + match[1] + '/b>b class="cityspell">' + match[2] + '/b>/li>'; 
     } 
     searchResult.push(str); 
    } 
   } 
   this.isEmpty = false; 
   // 如果搜索數(shù)據(jù)為空 
   if (searchResult.length == 0) { 
    this.isEmpty = true; 
    str = 'li class="empty">對(duì)不起，沒有找到數(shù)據(jù) "em>' + value + '/em>"/li>'; 
    searchResult.push(str); 
   } 
   // 如果slideul不存在則添加ul 
   if (!this.ul) { 
    var ul = this.ul = document.createElement('ul'); 
    ul.className = 'cityslide'; 
    this.rootDiv  this.rootDiv.appendChild(ul); 
    // 記錄按鍵次數(shù)，方向鍵 
    this.count = 0; 
   } else if (this.ul  Vcity._m.hasClass('hide', this.ul)) { 
    this.count = 0; 
    Vcity._m.removeClass('hide', this.ul); 
   } 
   this.ul.innerHTML = searchResult.join(''); 
 
   /* IE6 */ 
   this.changeIframe(); 
 
   // 綁定Li事件 
   this.liEvent(); 
  }else{ 
   Vcity._m.addClass('hide',this.ul); 
   Vcity._m.removeClass('hide',this.cityBox); 
 
   Vcity._m.removeClass('hide',this.myIframe); 
 
   this.changeIframe(); 
  } 
 }, 
 
 /* IE6的改變遮罩SELECT 的 IFRAME尺寸大小 */ 
 changeIframe:function(){ 
  if(!this.isIE6)return; 
  this.myIframe.style.width = this.rootDiv.offsetWidth + 'px'; 
  this.myIframe.style.height = this.rootDiv.offsetHeight + 'px'; 
 }, 
 
 /* * 
  * 特定鍵盤事件，上、下、Enter鍵 
  * @ KeyboardEvent 
  * */ 
 
 KeyboardEvent:function(event,keycode){ 
  var lis = Vcity._m.$('li',this.ul); 
  var len = lis.length; 
  switch(keycode){ 
   case 40: //向下箭頭↓ 
    this.count++; 
    if(this.count > len-1) this.count = 0; 
    for(var i=0;ilen;i++){ 
     Vcity._m.removeClass('on',lis[i]); 
    } 
    Vcity._m.addClass('on',lis[this.count]); 
    break; 
   case 38: //向上箭頭↑ 
    this.count--; 
    if(this.count0) this.count = len-1; 
    for(i=0;ilen;i++){ 
     Vcity._m.removeClass('on',lis[i]); 
    } 
    Vcity._m.addClass('on',lis[this.count]); 
    break; 
   case 13: // enter鍵 
    this.input.value = Vcity.regExChiese.exec(lis[this.count].innerHTML)[0]; 
    Vcity._m.addClass('hide',this.ul); 
    Vcity._m.addClass('hide',this.ul); 
    /* IE6 */ 
    Vcity._m.addClass('hide',this.myIframe); 
    break; 
   default: 
    break; 
  } 
 }, 
 
 /* * 
  * 下拉列表的li事件 
  * @ liEvent 
  * */ 
 
 liEvent:function(){ 
  var that = this; 
  var lis = Vcity._m.$('li',this.ul); 
  for(var i = 0,n = lis.length;i  n;i++){ 
   Vcity._m.on(lis[i],'click',function(event){ 
    event = Vcity._m.getEvent(event); 
    var target = Vcity._m.getTarget(event); 
    that.input.value = Vcity.regExChiese.exec(target.innerHTML)[0]; 
    Vcity._m.addClass('hide',that.ul); 
    /* IE6 下拉菜單點(diǎn)擊事件 */ 
    Vcity._m.addClass('hide',that.myIframe); 
   }); 
   Vcity._m.on(lis[i],'mouseover',function(event){ 
    event = Vcity._m.getEvent(event); 
    var target = Vcity._m.getTarget(event); 
    Vcity._m.addClass('on',target); 
   }); 
   Vcity._m.on(lis[i],'mouseout',function(event){ 
    event = Vcity._m.getEvent(event); 
    var target = Vcity._m.getTarget(event); 
    Vcity._m.removeClass('on',target); 
   }) 
  } 
 } 
};

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