DOM操作和jQuery实现选项移动操作的简单实例

DOM：

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>DOM选项移动操作</title>
  <style>
    select {
      width: 100px;
      height: 85px;
    }

    div {
      display: inline-block;
      width: 50px
    }
  </style>
</head>
<body>
     <select id="unsel" size="5" multiple><option>Argentina</option><option>Brazil</option><option>Canada</option><option>Chile</option><option>China</option><option>Cuba</option><option>Denmark</option><option>Egypt</option><option>France</option><option>Greece</option><option>Spain</option></select>
    <div>
      <button onclick="move(this.innerHTML)">&gt;&gt;</button>
      <button onclick="move(this.innerHTML)">&gt;</button>
      <button onclick="move(this.innerHTML)">&lt;</button>
      <button onclick="move(this.innerHTML)">&lt;&lt;</button>
    </div>
    <select id="sel" size="5" multiple>
    </select>
  <script>
    function $(id){
      return document.getElementById(id);
    }
    var unsel=null;//保存所有备选国家列表
    var sel=[];//保存已选中的国家列表
    window.onload=function(){
      unsel=$("unsel").innerHTML
              .replace(/<\/?option>/g," ")
              .match(/\b[a-zA-Z]+\b/g);
    }
    function move(inner){
      switch (inner){
        case "&gt;&gt;"://全部右移
          sel=sel.concat(unsel);
          unsel.length=0;
          sel.sort();
          break;
        case "&lt;&lt;"://全部左移
          unsel=unsel.concat(sel);
          sel.length=0;
          unsel.sort();
          break;
        case "&gt;"://选中项右移
          var opts=document.querySelectorAll("#unsel option");
          //从后向前遍历每个option
          for(var i=opts.length-1;i>=0;i--){
            if(opts[i].selected){
            //删除unsel中i位置的1个元素,直接压入sel
              sel.push(unsel.splice(i,1)[0]);
            }
          }
          sel.sort();
          break;
        case "&lt;"://选中项左移
          var opts=document.querySelectorAll("#sel option");
          for(var i=opts.length-1;i>=0;i--){
            if(opts[i].selected){
              unsel.push(sel.splice(i,1)[0]);
            }
          }
          unsel.sort();
          break;
      }
      show();
    }
    function show(){//将两个数组，更新到select元素中
      $("unsel").innerHTML="<option>"
                +unsel.join("</option><option>")
                +"</option>";
      $("sel").innerHTML="<option>"
                +sel.join("</option><option>")
                +"</option>";
    }
  </script>
</body>
</html>

jquery:

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>选项移动操作</title>
  <script src="jquery.min.js"></script>
  <style>
    select {
      width: 100px;
      height: 85px;
    }

    div {
      display: inline-block;
      width: 50px
    }
  </style>
</head>
<body>
  <select id="first" size="5" multiple>
    <option>Argentina</option>
    <option>Brazil</option>
    <option>Canada</option>
    <option>Chile</option>
    <option>China</option>
    <option>Cuba</option>
    <option>Denmark</option>
    <option>Egypt</option>
    <option>France</option>
    <option>Greece</option>
    <option>Spain</option>
  </select>
  <div>
    <button id="add">&gt;</button>
    <button id="add_all">&gt;&gt;</button>
    <button id="remove">&lt;</button>
    <button id="remove_all">&lt;&lt;</button>
  </div>
  <select id="second" size="5" multiple>
  </select>

  <script>
      $("#add").click(function(){
        // 将左边被选中的选项,移到右边去
        $("#first>option:selected").appendTo($("#second"));
      });
      $("#add_all").click(function(){
        $("#first>option").appendTo($("#second"));
      });
      $("#remove").click(function(){
        $("#second>option:selected").appendTo($("#first"));
      });
      $("#remove_all").click(function(){
        $("#second>option").appendTo($("#first"));
      });
      // 双击事件
      $("#first").dblclick(function(){
        $("#first>option:selected").appendTo($("#second"));
      });
      $("#second").dblclick(function(){
        $("#second>option:selected").appendTo($("#first"));
      });
  </script>
</body>
</html>

频道导航

DOM操作和jQuery实现选项移动操作的简单实例

您可能感兴趣的文章: