it would help us if we knew what your css in “allimagesgallery” looked like.
A little reformatting like the code below might help:
/*-----css---------*/
.imagesgalleryrow img{
display: inline-block;
}
<!-- /// HTML \ -->
<div class="allimagesgallery">
<div class="imagesgalleryrow">
<a href="images/image1.jpg">
<img id="galleryimages" src="images/image1.jpg">
</a>
<div class="caption"> CAPTION </div>
<a href="images/image2.jpeg">
<img id="galleryimages" src="images/image2.jpeg">
</a>
<div class="caption"> CAPTION </div>
<a href="images/image3.jpg">
<img id="galleryimages" src="images/image3.jpg">
</a>
<div class="caption"> CAPTION </div>
</div>
<div class="imagesgalleryrow">
<a href="images/image1.jpg">
<img id="galleryimages" src="images/image1.jpg">
</a>
<div class="caption"> CAPTION </div>
<a href="images/image2.jpeg">
<img id="galleryimages" src="images/image2.jpeg">
</a>
<div class="caption"> CAPTION </div>
<a href="images/image3.jpg">
<img id="galleryimages" src="images/image3.jpg">
</a>
<div class="caption"> CAPTION </div>
</div>
<div class="imagesgalleryrow">
<a href="images/image1.jpg">
<img id="galleryimages" src="images/image1.jpg">
</a>
<div class="caption"> CAPTION </div>
<a href="images/image2.jpeg">
<img id="galleryimages" src="images/image2.jpeg">
</a>
<div class="caption"> CAPTION </div>
<a href="images/image3.jpg">
<img id="galleryimages" src="images/image3.jpg">
</a>
<div class="caption"> CAPTION </div>
</div>
</div>