.tc
{
	background-position:center top;
	background-repeat:repeat-x;
}
.tr
{
	background-position:right top;
	background-repeat:no-repeat;
}
.mr
{
	background-position:right center;
	background-repeat:repeat-y;
}
.br
{
	background-position:right bottom;
	background-repeat:no-repeat;
}
.bc
{ 
	background-position:center bottom;
	background-repeat:repeat-x;
}
.bl
{
	background-position:left bottom;
	background-repeat:no-repeat;
}
.ml
{
	background-position:left center;
	background-repeat:repeat-y;
}
.tl
{
	background-position:left top;
	background-repeat:no-repeat;
}