JavaScript實現(xiàn)的級聯(lián)算法示例【省市二級聯(lián)動功能】

更新時間：2018年12月25日 10:35:06 作者：ChouCat

這篇文章主要介紹了JavaScript實現(xiàn)的級聯(lián)算法,結(jié)合省市二級聯(lián)動下拉菜單功能實例分析了javascript事件響應(yīng)與元素動態(tài)操作實現(xiàn)級聯(lián)算法的相關(guān)技巧,需要的朋友可以參考下

本文實例講述了JavaScript實現(xiàn)的級聯(lián)算法。分享給大家供大家參考，具體如下：

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title>LinkDemo</title>
    <script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>
    </script>
    <script type="text/javascript">
      var shengshiString = "1_山東省-11_德州市+12_青島市+13_濟(jì)南市~2_河北省-21_邯鄲市*211_臨漳縣/212_磁縣+22_石家莊市*221_定縣/222_寧縣+23_保定市";
      $(document).ready(function(){
        init();
      });
      function init(){
        var shengArray = shengshiString.split("~");
        for (var i = 0; i < shengArray.length; i++) {
          var sheng = shengArray[i].split("-")[0];
          var shi = shengArray[i].split("-")[1];
          var shengid = sheng.split("_")[0];
          var shengName = sheng.split("_")[1];
          var Newoption = $("<option></option>");
          $(Newoption).val(shengid);
          $(Newoption).text(shengName);
          $("#sheng").append(Newoption);
          if (i == 0) {
            shengchange(shengid);
          }
        }
      }
      function shengchange(shengidparam){
        $("#shi").empty();
        var shengArray = shengshiString.split("~");
        for (var i = 0; i < shengArray.length; i++) {
          var shengString = shengArray[i].split("-")[0];
          var shiString = shengArray[i].split("-")[1];
          var shengId = shengString.split("_")[0];
          if (shengidparam == shengId) {
            var shiArray = shiString.split("+");
            for (var j = 0; j < shiArray.length; j++) {
              var shistring = shiArray[j].split("*")[0];
              var shi = shistring;
              var shiId = shi.split("_")[0];
              var shiName = shi.split("_")[1];
              var Newoption = $("<option></option>");
              $(Newoption).val(shiId);
              $(Newoption).text(shiName);
              $("#shi").append(Newoption);
              if (shiName == "邯鄲市" || shiName == "石家莊市") {
                shichange(shiId);
              }
            }
          }
        }
      }
      function shichange(shiidparam){
        $("#xian").empty();
        var shengArray = shengshiString.split("~");
        for (var i = 0; i < shengArray.length; i++) {
          var shengString = shengArray[i].split("-")[0];
          var shiString = shengArray[i].split("-")[1];
          var shengId = shengString.split("_")[0];
          var shiArray = shiString.split("+");
          for (var j = 0; j < shiArray.length; j++) {
            var shistring = shiArray[j].split("*")[0];
            var xianarray = shiArray[j].split("*")[1];
            var shi = shistring;
            var shiId = shi.split("_")[0];
            var shiName = shi.split("_")[1];
            if (shiId == shiidparam) {
              var xian = xianarray.split("/");
              for (var s = 0; s < xian.length; s++) {
                var xianId = xian[s].split("_")[0];
                var xianName = xian[s].split("_")[1];
                var Newoption = $("<option></option>");
                $(Newoption).val(xianId);
                $(Newoption).text(xianName);
                $("#xian").append(Newoption);
              }
            }
          }
        }
      }
    </script>
  </head>
  <body>
    <select id="sheng" onchange="shengchange(this.value)">
    </select>
    <select id="shi" onchange="shichange(this.value)">
    </select>
    <select id="xian">
    </select>
  </body>
</html>

使用在線HTML/CSS/JavaScript代碼運行工具：http://tools.jb51.net/code/HtmlJsRun測試上述代碼，運行效果如下圖所示：