我有這樣的HTML代碼:創建自定義控件?
<select id="dummy4" name="dummy4" class="myselectbox">
<option>....</option>
<optgroup label="Agent1">
<option>Subagent1.1</option>
<option>Subagent1.2</option>
<option>Subagent1.3</option>
<option>Subagent1.N</option>
</optgroup>
<optgroup label="Agent2">
<option>Subagent2.1</option>
<option>Subagent2.2</option>
</optgroup>
...
是否有可能創建一個自定義的控制?