​x
 
<html>
<head>
<script type="text/javascript">
function checkWin()
  {
  document.write("The new window's name is: " + myWindow.name)
  }
</script>
</head>
<body>
​
<script type="text/javascript">
myWindow=window.open('','MyName','width=200,height=100')
myWindow.document.write("This is 'myWindow'")
</script>
​
<input type="button" value="What's the name of 'myWindow'?" onclick="checkWin()">
​
</body>
</html>
​