window.open('A','_blank''); 这里的var A这样用是错的吗
<!DOCTYPE html>
<html>
<head>
<title> new document </title>
<meta http-equiv="Content-Type" content="text/html; charset=gbk"/>
<script type="text/javascript">
function openWindow(){
var A = prompt("请输入想打开的网站","http://www.imooc.com/");
window.open('A','_blank','width=400,height=500,menubar=no,toolbar=no');
}
</script>
</head>
<body>
<input type="button" value="新窗口打开网站" onclick="openWindow()" />
</body>
</html>
