切换div，以便一次只打开一个，但也可以将它们全部关闭。

<button onclick="toggleDiv('div1')">Div 1</button>
<button onclick="toggleDiv('div2')">Div 2</button>
<button onclick="toggleDiv('div3')">Div 3</button>

<div id="div1" style="display: none;">Content of Div 1</div>
<div id="div2" style="display: none;">Content of Div 2</div>
<div id="div3" style="display: none;">Content of Div 3</div>

function toggleDiv(divId) {
  var div = document.getElementById(divId);
  var buttons = document.getElementsByTagName('button');
  
  for (var i = 0; i < buttons.length; i++) {
    var button = buttons[i];
    var targetDiv = document.getElementById(button.getAttribute('onclick').split("'")[1]);
    
    if (button === event.target) {
      div.style.display = 'block';
    } else {
      targetDiv.style.display = 'none';
    }
  }
}