小编use*_*109的帖子

我如何检查是否隐藏了所有带有类测试的div.如果它们全部隐藏,则将wrap1设置为隐藏.谢谢.

<div id='wrap1'>
<div class="header">Header 1</div>
<div class='test'><a href="#">Test 1</a></div>
<div class='test'><a href="#">Test 2</a></div>
<div class='test'><a href="#">Test 3</a></div>
</div>

更新:感谢大家真正快速的答案,我得到了它的工作.他们都非常有帮助.

如何使用jquery将一个图像淡入另一个图像？据我所知,你会使用fadeOut,用attr()更改源,然后再次使用fadeIn.但这似乎并不合适.我不想使用插件,因为我希望添加相当多的更改.

谢谢.

我有一个元素列表,我想在页面加载后使用标题div来分隔它们.所以下面的代码,

<div class="header">Header 1</div>
<div class='test'>Test 1</div>
<div class='test'>Test 2</div>
<div class='test'>Test 3</div>
<div class="header">Header 2</div>
<div class='test'>Test 4</div>
<div class='test'>Test 5</div>
<div class='test'>Test 6</div>
<div class='test'>Test 7</div>
<div class='test'>Test 8</div>
<div class="header">Header 3</div>
<div class='test'>Test 9</div>
<div class='test'>Test 10</div>
<div class='test'>Test 11</div>
<div class='test'>Test 12</div>
<div class="header">Header 4</div>
<div class='test'>Test 13</div>
<div class='test'>Test 14</div>

会成为,

<div class='wrap'>
<div class="header">Header 1</div>
<div class='test'>Test 1</div>
<div class='test'>Test 2</div>
<div class='test'>Test 3</div>
</div>
<div class='wrap'>
<div class="header">Header 2</div>
<div class='test'>Test 4</div>
<div …

我有以下代码输出亚马逊的项目列表,但我不知道如何访问特定的产品(与Summery,评论等).任何帮助,将不胜感激.

<?php



    function makeAWSUrl($parameters, $associate_tag, $access_key, $secret_key, $aws_version = '2009-06-01') {



        $host = 'ecs.amazonaws.com';

        $path = '/onca/xml';



        $query = array(        

        'Service' => 'AWSECommerceService',

        'AWSAccessKeyId' => $access_key,

        'AssociateTag' => $associate_tag,

        'Timestamp' => gmdate('Y-m-d\TH:i:s\Z'),

        'Version' => $aws_version,

        );



        // Merge in any options that were passed in

        if (is_array($parameters)) {

            $query = array_merge($query, $parameters);

        }



        // Do a case-insensitive, natural order sort on the array keys.

        ksort($query);



        // create the signable string

        $temp = array();



        foreach ($query as $k => $v) { …