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我想根据父div中图像的特定大小向父div添加一个类.

但是当我在父容器中添加更多div元素时,这个jquery代码不起作用

代码看起来像这样

<div>
    <div>
        <div>
            <img src='http://4.bp.blogspot.com/-Go-gvkEm4Rw/UszzNls6EYI/AAAAAAAAEfQ/qds_K1jXgLE/s1600/doctype-hi-res1-960x305.jpg'/>
        </div>
    </div>
</div>

我想要一个jquery代码,可以根据特定宽度的图像大小将类添加到主父div.

我有两个按钮,但它们并排显示.我想让他们在彼此之上.

<div id="top">
    <div>
        <label for="entityDropDown">Entity: </label>
        <select id="entityDropDown"></select>
        <div id="removeEntity"><a>?</a></div>
    </div>          
    <br><br>
    <div id="entityStatus">
        <div>
            <label for="entityAvailable">Entity Available</label>
            <select id="entityAvailable" multiple=""></select>
        </div>
        <div id="moveButtons">
            <button type="button">Add User</button>
            <button type="button">Remove</button>
        </div>
        <div>
            <label for="entityAssigned">Entity Assigned</label>
            <select id="entityAssigned" multiple=""></select>
        </div>
    </div>
    <br style="clear:both;">
</div>

这是小提琴http://jsfiddle.net/vS9vJ/

这是我的问题所遵循的代码......

jQuery的

$(document).ready(function(){
    $('.dude').hover(function(){
        $('div').find(">:first-child").css( "display", "inline" );
    }, function() {
    $('div').find(">:first-child").css( "display", "hidden" );
    );
});

CSS

.dude{
    min-height:50px;
}

HTML

<div class="dude">ONE<div>TWO</div>three</div>

当我将鼠标悬停在带有"dude"类的div框上时,我试图让TWO出现,只要用户正在徘徊,那么它就会回到隐藏状态.

我有一个本地存储阵列,如下所示

pageItems  = {"stationID":"145","categoryID":"-1","pickupDate":"2014-04-22","pickupTime":"08:00","returnDate":"2014-04-23","returnTime":"08:00","milage":"false","miles":"","attributes":[[],[]],"additionals":[[],[]]}

我需要将categoryID值更新为65

pageItems  = {"stationID":"145","categoryID":"65","pickupDate":"2014-04-22","pickupTime":"08:00","returnDate":"2014-04-23","returnTime":"08:00","milage":"false","miles":"","attributes":[[],[]],"additionals":[[],[]]}