单击或悬停时更改下拉列表 CSS？
受到 https 的启发： //stackoverflow.com/questions/624102/enable-a-currently-disabled-dropdown-list-when-clicking-the-dropdown-list 我尝试了一些方法，并为禁用的选择添加了一些灰色背景。
问题是，当我单击某些选择（禁用哪个单选按钮）时，下拉列表的背景保持灰色。
即使未选中单选按钮，单击时如何将其恢复正常（白色）？
你可以在这里看到它 http://jsbin.com/okuca/
这是我的实际代码
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Test </title>
<style type="text/css">
label.disabled select { opacity: 0.5; filter: alpha(opacity=50); background-color:#CCC; }
</style>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script>
<script type="text/javascript">
$(function() {
$('div.formdiv').bind('click',function() {
$('label.disabled',this).removeClass('disabled');
$('input:radio',this).attr('checked',true);
$('div.formdiv').not(this).find('label').addClass('disabled').find('select').attr('selectedIndex',0);
}).find('label').addClass('disabled');
});
</script>
</head>
<body>
<div class="formdiv">
<label for="Name">
<input id="Name" name="radio1" type="radio" />Name:
<select name="select1">
<option value="Rose">Rose</option>
<option value="Lily">Lily</option>
</select>
</br>
</label>
</div>
<div class="formdiv">
<label for="Colours">
<input id="Colours" name="radio1" type="radio" />Colour:
<select name="select2">
<option value="Red">Red</option>
<option value="Green">Green</option>
</select>
</label>
</br>
</div>
<div class="formdiv">
<label for="Sport">
<input id="Sport" name="radio1" type="radio" />Sport:
<select name="select3">
<option value="Tennis">Tennis</option>
<option value="Cricket">Cricket</option>
</select>
</label>
</br>
</div>
</body>
</html>
：可以在这里编辑： http://jsbin.com/okuca/edit
Inspired by https://stackoverflow.com/questions/624102/enable-a-currently-disabled-dropdown-list-when-clicking-the-dropdown-list I tried something and I added some grey background to disabled selection.
The problem is that when I click on some selection (which radio button was disabled) the background of the dropdown list remains grey.
How could I turn it back to normal (white) when clicked even if radio button isn't checked?
You can see it live here http://jsbin.com/okuca/
Here is my actual code:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Test </title>
<style type="text/css">
label.disabled select { opacity: 0.5; filter: alpha(opacity=50); background-color:#CCC; }
</style>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script>
<script type="text/javascript">
$(function() {
$('div.formdiv').bind('click',function() {
$('label.disabled',this).removeClass('disabled');
$('input:radio',this).attr('checked',true);
$('div.formdiv').not(this).find('label').addClass('disabled').find('select').attr('selectedIndex',0);
}).find('label').addClass('disabled');
});
</script>
</head>
<body>
<div class="formdiv">
<label for="Name">
<input id="Name" name="radio1" type="radio" />Name:
<select name="select1">
<option value="Rose">Rose</option>
<option value="Lily">Lily</option>
</select>
</br>
</label>
</div>
<div class="formdiv">
<label for="Colours">
<input id="Colours" name="radio1" type="radio" />Colour:
<select name="select2">
<option value="Red">Red</option>
<option value="Green">Green</option>
</select>
</label>
</br>
</div>
<div class="formdiv">
<label for="Sport">
<input id="Sport" name="radio1" type="radio" />Sport:
<select name="select3">
<option value="Tennis">Tennis</option>
<option value="Cricket">Cricket</option>
</select>
</label>
</br>
</div>
</body>
</html>
You can edit it here:
http://jsbin.com/okuca/edit
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问题是，在松开鼠标按钮（并且下拉菜单消失）之前，单击处理程序不会被触发，因此仍然应用
label.disabled select样式。有两种方法可以解决这个问题。 首先，您可以为
:focus添加另一个 CSS 规则，它会覆盖禁用的样式：但是，如果您的样式变得更加复杂，这可能会给您带来麻烦。 相反，我建议将您的点击处理程序更改为 mousedown 处理程序：
这会导致处理程序在下拉列表出现之前触发（并且类将被删除）。
The problem is that the click handler isn't being fired until you let go of the mouse button (and the drop-down vanishes), so the
label.disabled selectstyle is still applied.There are two ways to fix this. First, you could add another CSS rule for
:focus, which overrides the disabled styling:However, this could get you into trouble if your styles get more convoluted. Instead, I'd recommend changing your click handler to a mousedown handler:
This causes the handler to fire (and the class to be removed) before the drop-down appears.