ПРИМЕР:

Selest меню

Код:
 <head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>jQuery UI Selectmenu - Default functionality</title>
  <link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css">
  <link rel="stylesheet" href="/resources/demos/style.css">
  <style>
    fieldset {
      border: 0;
    }
    label {
      display: block;
      margin: 30px 0 0 0;
    }
    .overflow {
      height: 200px;
    }
  </style>
  <script src="https://code.jquery.com/jquery-1.12.4.js"></script>
  <script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
  <script>
  $( function() {
    $( "#speed" ).selectmenu();
 
    $( "#files" ).selectmenu();
 
    $( "#number" )
      .selectmenu()
      .selectmenu( "menuWidget" )
        .addClass( "overflow" );
 
    $( "#salutation" ).selectmenu();
  } );
  </script>
</head>
<body>
 
<div class="demo">
 
<form action="#">
 
  <fieldset>
    <label for="speed">Select a speed</label>
    <select name="speed" id="speed">
      <option>Slower</option>
      <option>Slow</option>
      <option selected="selected">Medium</option>
      <option>Fast</option>
      <option>Faster</option>
    </select>
 
    <label for="files">Select a file</label>
    <select name="files" id="files">
      <optgroup label="Scripts">
        <option value="jquery">jQuery.js</option>
        <option value="jqueryui">ui.jQuery.js</option>
      </optgroup>
      <optgroup label="Other files">
        <option value="somefile">Some unknown file</option>
        <option value="someotherfile">Some other file with a very long option text</option>
      </optgroup>
    </select>
 
    <label for="number">Select a number</label>
    <select name="number" id="number">
      <option>1</option>
      <option selected="selected">2</option>
      <option>3</option>
      <option>4</option>
      <option>5</option>
      <option>6</option>
      <option>7</option>
      <option>8</option>
      <option>9</option>
      <option>10</option>
      <option>11</option>
      <option>12</option>
      <option>13</option>
      <option>14</option>
      <option>15</option>
      <option>16</option>
      <option>17</option>
      <option>18</option>
      <option>19</option>
    </select>
 
    <label for="salutation">Select a title</label>
    <select name="salutation" id="salutation">
      <option disabled selected>Please pick one</option>
      <option>Mr.</option>
      <option>Mrs.</option>
      <option>Dr.</option>
      <option>Prof.</option>
      <option>Other</option>
    </select>
  </fieldset>
 
</form>
 
</div>
 
 
</body>
</html>