運行沒結果，怎么回事？
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>window對象</title>
<script type="text/javascript">
? ? function myfun{
? ? ? ? alert("點擊我，彈出新窗口！");
? ? ? ? window.open("http://www.xianlaiwan.cn","_break","width=600,height=400 ");
? ??
? ? }
</script>
</head>
<body>
<form>
<input type="button" value="點擊我，打開新窗口" onclick="myfun()" />
</form>
</body>
</html>
2017-08-13
<script type="text/javascript">
? ? function myfun(){
? ? alert("點擊我，彈出新窗口！");
? ? window.open("http://www.xianlaiwan.cn","_blank","width=600px,height=400px ");
?}
</script>
</head>
<body>
<form>
<input type="button" value="點擊我，打開新窗口" onclick="myfun()" />
2017-05-01
定義函數的時候忘記寫"()"了，應該是"function myfun(){"