.left
{
	float: left;
}
.right
{
	float: right;
}
.clear
{
	clear: both;
}

/* for IE6 */
.middle1
{
	position: relative;
}
.middle2
{
	position:absolute;
	top:50%;
}
.middle3
{
	top: -50%;
	position: relative;
}
/* for other browsers */
.middle1[class]
{
	display: table;
	position: static;
}
.middle2[class]
{
	display: table-cell;
	vertical-align: middle;
	position: static;
}
.middle3[class]
{
	top: auto;
	left: auto;
	margin: 0 auto;
}