.align_center
{
position: relative;
width: 100%;
}
.align_center:after
{
content: '';
display: block;
clear: both;
}
.align_center_to_left
{
position: relative;
right: 50%;
float: right;
}
.align_center_to_right
{
position: relative;
z-index: 1;
right: -50%;
}