使用javascript获取选择的值 [英] Getting a select's value with javascript

问题描述

我有以下简明格式

<form name="thecars">
<select name="cars">
    <option value="mustang">Mustang</option>
    <option value="pinto">Pinto</option>
    <option value="pinto">Chevelle</option>
    <option value="pinto">Other</option>
</select>
</form>

我正在尝试通过以下方法获得所选汽车的价值，但它不起作用

I am trying to get the value of the selected car by the following but it is not working

selectedCar = document.forms["thecars"].elements["cars"].options[thecars.cars.options.selectedIndex].value;

推荐答案

正确的代码为:

var oForm = document.forms["thecars"];
var oDDL = oForm.elements["cars"];
var selectedCar = oDDL.value;

仅使用表单名称就无法获得对该表单的引用.

You can't get reference to the form by just using its name.

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