JavaScript使用window.open打开新窗口并控制其位置

<!DOCTYPE html>
<html>
<head>
<script>
function openWin()
{
myWindow=window.open('','','width=200,height=100');
myWindow.document.write("<p>This is 'myWindow'</p>");
}
function moveWin()
{
myWindow.moveTo(0,0);
myWindow.focus();
}
</script>
</head>
<body>
<input type="button" value="Open 'myWindow'" 
onclick="openWin()" />
<br><br>
<input type="button" value="Move 'myWindow'" 
onclick="moveWin()" />
</body>
</html>