求助:实现左边复选框的内容添加到右边的框中
<select name="select" size="5" style="width:100px">
<option>1</option>
</select>
<input type="button" name="Submit2" value="1----->2" onClick="ok1()">
<select name="select2" size="5" style="width:100px">
<option>2</option>
</select>