单击div时，引导弹出窗口保持不动

<div id="myDiv" onclick="handleDivClick()">
  点击我
</div>

<div id="popupWindow">
  弹出窗口内容
</div>

#popupWindow {
  position: absolute;
  top: 100px;
  left: 100px;
  width: 200px;
  height: 150px;
  background-color: #fff;
  border: 1px solid #ccc;
}

#myDiv {
  width: 100px;
  height: 50px;
  background-color: #f00;
  color: #fff;
  text-align: center;
  line-height: 50px;
}

function handleDivClick(event) {
  // 阻止事件冒泡
  if (event) {
    event.stopPropagation();
  }
}