代码示例:(标识:jsref_window_opener)
<!DOCTYPE html>
<html>
<head>
<script>
function openWin() {
  var myWindow = window.open("", "", "width=400, height=200");
  myWindow.opener.document.getElementById("demo").innerHTML = 
  "已经打开一个新窗口。";
}
</script>
</head>
<body>

<button onclick="openWin()">打开 myWindow</button>

<p id="demo"></p>

</body>
</html>
运行结果: