css的img布满全屏

1. background-image的布满全屏

'background-image': 'url',

'width':'100%',

'max-width':'100%',

'max-height':'500px',

'height': '330px',

'background-size':'100% 100%',

'-moz-background-size':'100% 100%',

'background-repeat': 'no-repeat'