background: url('../../images/bflogin/bei.jpg') no-repeat 0 center;
-webkit-background-size:cover;
background-size:cover;
document.getElementsByClassName('main-top')[0].style.background = "url('" + image_list[i] + " ') no-repeat 0 center" ;
document.getElementsByClassName('main-top')[0].style.backgroundImage = "url('" + image_list[i] + " ') ";
可以設置如下屬性:
- background-color
- background-position
- background-size
- background-repeat
- background-origin
- background-clip
- background-attachment
- background-image
如果不設置其中的某個值,也不會出問題,比如 background:#ff0000 url('smiley.gif'); 也是允許的。