Background position for the homework sprites

gistfile1.css

/* Home Button */
nav li.home {
	width:115px; 
	height:60px;
	}

nav li.home a{
	background-position:-5px -5px;
	}
nav li.home a:hover{
	background-position:-5px -75px;
	}
nav li.home a.selected{  /* The selected class is used once per page. The purpose is to show that this particular button is the page we are on */
	background-position:-5px -145px;
	}


/* About Button */
nav li.about{
		width:120px; 
		height:60px;
		}
	nav li.about a{
		background-position:-125px -5px;
		}
	nav li.about a:hover{
		background-position:-125px -75px;
		}
	nav li.about a.selected{
		background-position:-125px -145px;
		}



/* Contact Button */
nav li.contact{
		width:160px; 
		height:60px;
	}
	nav li.contact a{
		background-position:-250px -5px;
	}
	nav li.contact a:hover{
		background-position:-250px -75px;
	}
	nav li.contact a.selected{
		background-position:-250px -145px;
	}