<style type="text/css">
.t {}
.b {}
.l {}
.r {}
.bl {background: url(bl.jpg) 0 100% no-repeat}
.br {background: url(br.jpg) 100% 100% no-repeat}
.tl {background: url(tl.jpg) 0 0 no-repeat}
.tr {background: url(tr.jpg) 100% 0 no-repeat; padding:10px} 
.bl_azulclaro {background: url(bl_azulclaro.gif) 0 100% no-repeat}
.br_azulclaro {background: url(br_azulclaro.gif) 100% 100% no-repeat}
.tl_azulclaro {background: url(tl_azulclaro.gif) 0 0 no-repeat}
.tr_azulclaro {background: url(tr_azulclaro.gif) 100% 0 no-repeat; padding:10px} 
.bl_bg {background: url(bl_bg.jpg) 0 100% no-repeat}
.br_bg {background: url(br_bg.jpg) 100% 100% no-repeat}
.tl_bg {background: url(tl_bg.jpg) 0 0 no-repeat}
.tr_bg {background: url(tr_bg.jpg) 100% 0 no-repeat; padding:10px} 
</style>
