单击按钮时，循环切换div列表并切换可见性

<button onclick="toggleDiv()">切换列表</button>

<div id="div1" style="display: block;">内容1</div>
<div id="div2" style="display: none;">内容2</div>
<div id="div3" style="display: none;">内容3</div>

var divList = ["div1", "div2", "div3"];
var currentIndex = 0;

function toggleDiv() {
  var currentDiv = document.getElementById(divList[currentIndex]);
  var nextIndex = (currentIndex + 1) % divList.length;
  var nextDiv = document.getElementById(divList[nextIndex]);
  
  currentDiv.style.display = "none";
  nextDiv.style.display = "block";
  
  currentIndex = nextIndex;
}