iv class="imgs">
			<div class="a-img-box">
				<img class="left-img" src="" alt="">
			</div>
			<div class="a-img-box">
				<img class="the-img" src="" alt="">
			</div>
			<div class="a-img-box">				
				<img class="right-img" src="" alt="">
			</div>
		</div>
	</div>
	<button onclick="preImg()">上一个</button>
	<button onclick="nextImg()">下一个</button>

	<script>
		let arr = ['img/1.jpg','img/2.jpg','img/3.jpg','img/4.jpg','img/5.jpg','img/6.jpg']

		let imgs = document.querySelector('.imgs')
		