用jQuery实现<select>选项上下移动

来源：互联网发布：王宝强演技知乎编辑：程序博客网时间：2024/06/01 07:18

用jQuery实现<select>选项上下移动

<html> <head>  <script type='text/javascript'    src='http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.js'></script>  <script type='text/javascript'>  $(function() {   $("#btnMoveUp,#btnMoveDown").click(function() {     var $opt = $("#selList option:selected:first");     if (!$opt.length) return;     if (this.id == "btnMoveUp") $opt.prev().before($opt);     else $opt.next().after($opt);   });   //按Alt加上下鍵也可以移動   $("#selList").keydown(function(evt) {     if (!evt.altKey) return;     var k = evt.which;     if (k == 38) { $("#btnMoveUp").click(); return false; }     else if (k == 40) { $("#btnMoveDown").click(); return false; }   });   });   </script>  </head><body>  <select id='selList' size='7' style='width: 100px'>  <option>Item 1</option>  <option>Item 2</option>  <option>Item 3</option>  <option>Item 4</option>  <option>Item 5</option>  </select><br />  <input type="button" value="▲" id="btnMoveUp" title="快速鍵: alt+向上" />  <input type="button" value="▼" id="btnMoveDown" title="快速鍵: alt+向下"/>  </body>  </html>

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