jquery中怎样获取css中display属性值为block的元素 ？

Question

<div id="img1" name="hh">
<img class="img1" src="./img/001.jpg"/>
</div>
<div style="display:none" id="img23">
<img class="img2" src="./img/002.jpg"/>
<img class="img2" src="./img/003.jpg"/>
</div>
<div style="display:none" id="img4">
<img class="img4" src="./img/004.jpg"/>

</div>