Замена картинок углов рамки на спрайт - Вопросы по CSS

#wm .amoney_tr {
	background: url('../images/jc_rb_tr.gif') no-repeat scroll 100% 0% transparent;
    height: 10px;
    overflow: hidden;
    padding-right: 13px;
}
#wm .amoney_tl {
	background: url('../images/jc_rb_tl.gif') no-repeat scroll 0% 0% transparent;
    padding-left: 13px;
}
#wm .amoney_br {
	background: url('../images/jc_rb_br.gif') no-repeat scroll 100% 100% transparent;
    height: 13px;
    padding-right: 13px;
}
#wm .amoney_bl {
	background: url('../images/jc_rb_bl.gif') no-repeat scroll 0% 100% transparent;
    padding-left: 13px;
}

.sprite {
	background: url('../images/donate_am.png') no-repeat -297px -202px;
	width: 13px;
	height: 13px;
}
.sprite {
	background: url('../images/donate_am.png') no-repeat -297px -216px;
	width: 13px;
	height: 13px;
}
.sprite {
	background: url('imgs/donate_am.png') no-repeat -283px -202px;
	width: 13px;
	height: 13px;
}
.sprite {
	background: url('imgs/donate_am.png') no-repeat -283px -216px;
	width: 13px;
	height: 13px;
}

.sprite {
	background: url('imgs/donate_am.png') no-repeat 56.713% 43.287%;
	width: 13px;
	height: 13px;
}

#wm .amoney_tr {
background: url('imgs/donate_am.png') no-repeat 59.519% 40.481%;
    height: 10px;
    overflow: hidden;
    padding-right: 13px;
}

-moz-border-radius: 6px;
-webkit-border-radius: 6px;
border-radius: 6px;
-moz-background-clip: padding;
-webkit-background-clip: padding-box;
background-clip: padding-box;

.border-radius (@border-radius){
     border-radius: @border-radius;
    -moz-border-radius: @border-radius;
    -webkit-border-radius: @border-radius;
}