使用jQuery更改下拉列表的选定值

问题：

I have a drop-down list with known values. 我有一个带有已知值的下拉列表。 What I'm trying to do is set the drop down list to a particular value that I know exists using jQuery. 我正在尝试将下拉列表设置为使用jQuery知道的特定值。 Using regular JavaScript, I would do something like: 使用常规JavaScript，我会做类似的事情：

ddl = document.getElementById("ID of element goes here");
ddl.value = 2; // 2 being the value I want to set it too.

However, I need to do this with jQuery, because I'm using a CSS class for my selector (stupid ASP.NET client ids...). 但是，我需要使用jQuery，因为我在选择器中使用了CSS类（愚蠢的ASP.NET客户端ID ...）。

Here are a few things I've tried: 这是我尝试过的一些方法：

$("._statusDDL").val(2); // Doesn't find 2 as a value.
$("._statusDDL").children("option").val(2) // Also failed.

How can I do it with jQuery? 如何使用jQuery？

Update 更新资料

So as it turns out, I had it right the first time with: 事实证明，我第一次做对了：

$("._statusDDL").val(2);

When I put an alert just above it works fine, but when I remove the alert and let it run at full speed, I get the error 当我在上面放一个警报时，它可以正常工作，但是当我删除警报并使它以全速运行时，我得到了错误

Could not set the selected property. 无法设置所选属性。 Invalid Index 无效索引

I'm not sure if it's a bug with jQuery or Internet Explorer 6 (I'm guessing Internet Explorer 6), but it's terribly annoying. 我不确定这是不是jQuery或Internet Explorer 6的错误（我猜是Internet Explorer 6），但这非常令人讨厌。