.top-left {
   position:fixed;
	left:0px;
	top:0px;
}

.top-right {
   position:fixed;
	right:0px;
	top:0px;
}

.bottom-left {
   position:fixed;
	left:0px;
	bottom:0px;
}

.bottom-right {
   position:fixed;
	right:0px;
	bottom:0px;
}

.bottom {
   position:fixed;
	bottom:0px;
}

.center {
   position:fixed;
	top:0px;
	width:50%;
	left:25%;
}