selector 添加

	$(document).ready(
			function()
			{   
	   $("#listOne").dblclick(
			   function()
			   {   
	      			$("#listOne option:selected").appendTo("#listTwo");   
	     	    }
	     	    );   
	       }
			);  

 html 内容

<select size="10" class="myText" id="listOne">   
     <option value="ddd" />eeeee
     <option value="ddd1" />eeeee1
     <option value="ddd2" />eeeee2
     <option value="ddd3" />eeeee3
     <option value="ddd4" />eeeee4
    </select> 
		<input type="button" onclick="usb()" value="enter" />
		
		<div id="mmu"></div>
		<select size="10" class="myText" id="listTwo">