뒷배경을 내용창 밖에 넣을려면 어떻게 해요?ㅜㅜ

어떤 팁보고 따라했는데 뒤를 보시다시피ㅠㅠ

HTML은

<p><br></p><style> div.viewContent {background-image:url(http://i.imgur.com/0rcex6Z.jpg); background-attachment: fixed;  background-position: top;}</style>

라고 썼는데

<style> div.viewContent {background-image:url(http://i.imgur.com/0rcex6Z.jpg); background-attachment: fixed; background-position: top;}</style>

왜 이러죠?