jquery设置隐藏的输入值在IE7和IE8中无法正常工作

继续采用我的代码来处理IE ...

Continuing adopting my code to work with IE...

我有一个包含表格的隐藏 div 编辑一些信息。当用户选择要编辑的项目时，将显示此div，并使用该项目的信息填充字段。 div（简化术语）看起来像这样：

I have a hidden div containing a form to edit some information. When the user selects the item to edit, this div is shown and the fields are populated with the information for the item. That divs (in simplified terms) looks like this:

<div id="editform">
<form action="" method="post" id="qform" name="qform">
    First param: <input name="field1" id="field1"/> <br/>
    Second param: <input name="field2" id="field2"/> <br/>
    ...

    <input type="hidden" name="qid" id="qid" value=""/>

    <img id="submit" src="..." alt="..." title="..." />
</form>

我使用jquery将值设置到字段中。我打开编辑div的功能如下所示：

I use jquery to set the values into the fields. My function for opening up the editing div looks something like this:

function edit_item(item_id) {
    item = get_item(item_id);    //this will return a JS object
    $('#field1').val(item.property1);
    $('#field2').val(item.property2);
    ...
    $('#qid').val(item_id);
    $('#submit').click(function() {
        alert($('#qid').val());
        $('#qform').ajaxSubmit();
    });
}

所有这些在FF，Opera，Webkit和IE 9中都能正常工作在IE7和IE8中，我遇到了一个奇怪的问题。我可以在 edit_item 函数中看到 item_id 正确设置，但是一旦该函数完成，隐藏的输入值（ qid ）重置为空字符串。当表单被ajax提交时，警报会将值显示为空字符串，尽管它已正确设置。有趣的是，所有其他领域都很好。它在IE 9中正常工作。

All of this works fine in FF, Opera, Webkit and IE 9, however in IE7 and IE8, I'm having a strange problem. I can see the item_id being set correctly in the edit_item function, however as soon as that function completes, the hidden input value (qid) gets reset to the empty string. When the form is being ajax-submitted, the alert shows the value to be an empty string despite it being set correctly. Interestingly, all other fields are fine. And it works correctly in IE 9.

我在这里缺少什么？非常感谢提前。

What am I missing here? Many thanks in advance.