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>