.m1 { background: url(../images/m1.png) no-repeat left top; width:9px; height:9px;}
.m2 { background: url(../images/m2.png) no-repeat right top; width:9px; height:9px;}
.m3 { background: url(../images/m3.png) no-repeat right bottom; width:9px; height:9px;}
.m4 { background: url(../images/m4.png) no-repeat left bottom; width:9px; height:9px;}

.b12 { height: 9px; background: url(../images/m12.png) repeat-x left top;}
.b23 { width: 9px; background: url(../images/m23.png) repeat-y right top;}
.b34 { height: 9px; background: url(../images/m34.png) repeat-x left bottom;}
.b41 { width: 9px; background: url(../images/m41.png) repeat-y left top;}