jQuery的获取值从多个共同选择 [英] jQuery getting values from multiple selects together

问题描述

我有以下code，基本上，当选择的值更改我希望能够采取新的值，并将其添加到现有的值（或减去它）。

I've got the following code which basically when the value of the select is changed I want to be able to take the new value and add it to the already existing value (or minus it).

我有一个问题实际上是抓住了价值。我有这个创建选择列表：

I'm having an issue actually grabbing the value. I have this to create the select lists:

      <li class="extraHeight">
    <asp:Image runat="server" CssClass="iconImageMove" ID="Image14" ImageUrl="~/images/icons/carpark_off.png" />
    <div class="flipWidth">
        <select name="access" class="change" id="carpark_off"  runat="server">
            <option value="0">Off</option>
            <option value="256">On</option>
        </select>
     </div> <br /> <p class="noWrap">Accessible Car parking facilities</p>
</li>

        <li class="extraHeight">
    <asp:Image runat="server" CssClass="iconImageMove" ID="Image15" ImageUrl="~/images/icons/parking_off.png" />
    <div class="flipWidth">
        <select name="access" class="change" id="parking_off"  runat="server">
            <option value="0">Off</option>
            <option value="33554432">On</option>
        </select>
     </div> <br /> <p class="noWrap">Customer Car parking facilities</p>
</li>

        <li class="extraHeight">
    <asp:Image runat="server" CssClass="iconImageMove" ID="Image16" ImageUrl="~/images/icons/staff_off.png" />
    <div class="flipWidth">
        <select name="access" class="change" id="staff_off"  runat="server">
            <option value="0">Off</option>
            <option value="8192">On</option>
        </select>

（有很多，但，给你一个想法）

(There are a lot more but that gives you an idea)

我使用jQuery的下面一个检测到变化并试图抢的价值，但它不工作：

I'm using the following jQuery to detect the change and try and grab the value but it's not working:

<script>

    var value = $("select").val()
    $("select").change(function () {
          alert(value);
        })

</script>

任何建议将真正成为AP preciated！

Any suggestions would really be appreciated!

汤姆

推荐答案

您只选择初始值。你需要得到改变事件中的价值。

You are only selecting the initial value. You need to get the value inside the change event.

$("select").change(function () {
 var value = $(this).val()
 alert(value);
})

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