.L_Top
{
    background-position-y: top;
    background-image: url(Pictures/top.png);
    background-repeat: repeat-x;
}
.L_Middle
{
    background-position-y: top;
    background-image: url(Pictures/middle.png);
    background-repeat: repeat-x;
   
}

.L_GridHeader
{
    background-position-y: top;
    background-image: url(Pictures/gridheader.png);
    background-repeat: repeat-x;
}