css里面如何设置body背景图片满屏

@{
    Layout = null;
    ViewBag.Title = "Login Page";
}
<!DOCTYPE html>
<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>IndexMain</title>
    @*样式*@
    <style>
        body {
            height: 100%;width: 100%;
            background: url('../../Images/LoginIMG/LoginBackground.jpg');
            background-size:cover;
        }
    </style>
</head>
<body>
    <div> 
    </div>
</body>
</html>

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