下拉框的选择跳转事件（jqure）

<select id="coupontype">
                        <option value="@CouponType.全部" href="@Url.Action("Index", "SpecialOffers", new { couponType = CouponType.全部 })" @(couponType == CouponType.全部?"checked":"")>全部</option>
                        <option value="@CouponType.平台" href="@Url.Action("Index", "SpecialOffers", new { couponType = CouponType.平台 })" @(couponType == CouponType.平台 ? "checked" : "")>平台</option>
                        <option value="@CouponType.商家" href="@Url.Action("Index", "SpecialOffers", new { couponType = CouponType.商家 })" @(couponType == CouponType.商家 ? "checked" : "")>商家</option>
</select>

以上为页面样式，增加的href属性为放选择链接的。以下为jqure代码，
<script>
    $("#coupontype").change(function (event) {
        var invoker = $.event.fix(event).target;
        var targetHref = $(invoker).attr("href");
        location.href = targetHref;
    });
</script>