任务中窗口宽高的设置中为什么width和heigth之间加逗号和不加逗号打开的窗口大小不一样
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>window对象</title>
<script type="text/javascript">
alert("欢迎来到慕课网！")
function myFunction()
{
window.open('http://www.imooc.com','_blank','width=600, height=400')
// window.open('http://www.imooc.com','_blank','width=600 height=400')
}
</script>
</head>
<body>
<form>
<input type="button" value="点击我，打开新窗口" onclick="myFunction()" />
</form>
</body>
</html>
