<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
select{
width:170px;
height:240px;
background-color: #2cff2f;
font-size: 18px;
}
</style>
<script src="js/jquery-1.11.1.js"></script>
<script>
$(function () {
$("button:eq(0)").click(function () {
$("#sel2").append($("#sel1 option"));
});
$("button:eq(1)").click(function () {
$("#sel1").append($("#sel2 option"));
});
$("button:eq(2)").click(function () {
$("#sel2").append($("#sel1 option:selected"));
});
$("button:eq(3)").click(function () {
$("#sel1").append($("#sel2 option:selected"));
});
});
</script>
</head>
<body>
<select name="" id="sel1" size="10" multiple>
<option value="">香蕉</option>
<option value="">苹果</option>
<option value="">鸭梨</option>
<option value="">葡萄</option>
</select>
<button>>>></button>
<button><<<</button>
<button>></button>
<button><</button>
<select name="" id="sel2" size="10" multiple>
</select>
</body>
</html>