.span12 {
		width:1170px
	}
	.span11 {
		width:1070px
	}
	.span10 {
		width:970px
	}
	.span9 {
		width:870px
	}
	.span8 {
		width:770px
	}
	.span7 {
		width:670px
	}
	.span6 {
		width:570px
	}
	.span5 {
		width:470px
	}
	.span4 {
		width:370px
	}
	.span3 {
		width:270px
	}
	.span2 {
		width:170px
	}
	.span1 {
		width:70px
	}