$(function(){
	
		$('#topnav #services_button')
			.css( {backgroundPosition: "0px 80px"} )
			.mouseover(function(){
				$(this).stop().animate({backgroundPosition:"(0px 0px)"}, {duration:400})
			})
			.mouseout(function(){
				$(this).stop().animate({backgroundPosition:"(0px 80px)"}, {duration:200, complete:function(){
					$(this).css({backgroundPosition: "0px 80px"})
				}})
			})
			
		$('#topnav #casestudies_button')
			.css( {backgroundPosition: "0px 80px"} )
			.mouseover(function(){
				$(this).stop().animate({backgroundPosition:"(0px 0px)"}, {duration:400})
			})
			.mouseout(function(){
				$(this).stop().animate({backgroundPosition:"(0px 80px)"}, {duration:200, complete:function(){
					$(this).css({backgroundPosition: "0px 80px"})
				}})
			})
			
		$('#topnav #portfolio_button')
			.css( {backgroundPosition: "0px 80px"} )
			.mouseover(function(){
				$(this).stop().animate({backgroundPosition:"(0px 0px)"}, {duration:400})
			})
			.mouseout(function(){
				$(this).stop().animate({backgroundPosition:"(0px 80px)"}, {duration:200, complete:function(){
					$(this).css({backgroundPosition: "0px 80px"})
				}})
			})
		$('#topnav #about_button')
			.css( {backgroundPosition: "0px 80px"} )
			.mouseover(function(){
				$(this).stop().animate({backgroundPosition:"(0px 0px)"}, {duration:400})
			})
			.mouseout(function(){
				$(this).stop().animate({backgroundPosition:"(0px 80px)"}, {duration:200, complete:function(){
					$(this).css({backgroundPosition: "0px 80px"})
				}})
			})
		$('#topnav #safety_button')
			.css( {backgroundPosition: "0px 80px"} )
			.mouseover(function(){
				$(this).stop().animate({backgroundPosition:"(0px 0px)"}, {duration:400})
			})
			.mouseout(function(){
				$(this).stop().animate({backgroundPosition:"(0px 80px)"}, {duration:200, complete:function(){
					$(this).css({backgroundPosition: "0px 80px"})
				}})
			})
		$('#topnav #contact_button')
			.css( {backgroundPosition: "0px 80px"} )
			.mouseover(function(){
				$(this).stop().animate({backgroundPosition:"(0px 0px)"}, {duration:400})
			})
			.mouseout(function(){
				$(this).stop().animate({backgroundPosition:"(0px 80px)"}, {duration:200, complete:function(){
					$(this).css({backgroundPosition: "0px 80px"})
				}})
			})
	});