function page_one() 
{
    $('#nav_one').css({backgroundPosition: '0px 0px'});
    $('#nav_two').css({backgroundPosition: '-200px -75px'});
    $('#nav_three').css({backgroundPosition: '-348px -75px'});
    $('#nav_four').css({backgroundPosition: '-605px -75px'});
    $('#nav_two').hover(
    	function() {
    		$(this).css({backgroundPosition: '-200px 0px'});
    	},
    	function() {
    		$(this).css({backgroundPosition: '-200px -75px'});
    	}
    );
    $('#nav_three').hover(
        function() {
        	$(this).css({backgroundPosition: '-348px 0px'});
        },
        function() {
        	$(this).css({backgroundPosition: '-348px -75px'});
        }
    );
    $('#nav_four').hover(
        function() {
        	$(this).css({backgroundPosition: '-605px 0px'});
        },
        function() {
        	$(this).css({backgroundPosition: '-605px -75px'});
        }
    );
}

function page_two() 
{
	$('#nav_one').css({backgroundPosition: '0px -75px'});
	$('#nav_two').css({backgroundPosition: '-200px 0px'});
	$('#nav_three').css({backgroundPosition: '-348px -75px'});
	$('#nav_four').css({backgroundPosition: '-605px -75px'});
	$('#nav_one').hover(
	    function() {
	    	$(this).css({backgroundPosition: '0px 0px'});
	    },
	    function() {
	    	$(this).css({backgroundPosition: '0px -75px'});
	    }
	);
	$('#nav_three').hover(
	    function() {
	    	$(this).css({backgroundPosition: '-348px 0px'});
	    },
	    function() {
	    	$(this).css({backgroundPosition: '-348px -75px'});
	    }
	);
	$('#nav_four').hover(
	    function() {
	    	$(this).css({backgroundPosition: '-605px 0px'});
	    },
	    function() {
	    	$(this).css({backgroundPosition: '-605px -75px'});
	    }
	);
}

function page_three() 
{
	$('#nav_one').css({backgroundPosition: '0px -75px'});
	$('#nav_two').css({backgroundPosition: '-200px -75px'});
	$('#nav_three').css({backgroundPosition: '-348px 0px'});
	$('#nav_four').css({backgroundPosition: '-605px -75px'});
	$('#nav_one').hover(
	    function() {
	    	$(this).css({backgroundPosition: '0px 0px'});
	    },
	    function() {
	    	$(this).css({backgroundPosition: '0px -75px'});
	    }
	);
	$('#nav_two').hover(
	    function() {
	    	$(this).css({backgroundPosition: '-200px 0px'});
	    },
	    function() {
	    	$(this).css({backgroundPosition: '-200px -75px'});
	    }
	);
	$('#nav_four').hover(
	    function() {
	    	$(this).css({backgroundPosition: '-605px 0px'});
	    },
	    function() {
	    	$(this).css({backgroundPosition: '-605px -75px'});
	    }
	);

}

function page_four() 
{
	$('#nav_one').css({backgroundPosition: '0px -75px'});
	$('#nav_two').css({backgroundPosition: '-200px -75px'});
	$('#nav_three').css({backgroundPosition: '-348px -75px'});
	$('#nav_four').css({backgroundPosition: '-605px 0px'});
	$('#nav_one').hover(
	    function() {
	    	$(this).css({backgroundPosition: '0px 0px'});
	    },
	    function() {
	    	$(this).css({backgroundPosition: '0px -75px'});
	    }
	);
	$('#nav_two').hover(
	    function() {
	    	$(this).css({backgroundPosition: '-200px 0px'});
	    },
	    function() {
	    	$(this).css({backgroundPosition: '-200px -75px'});
	    }
	);
	$('#nav_three').hover(
	    function() {
	    	$(this).css({backgroundPosition: '-348px 0px'});
	    },
	    function() {
	    	$(this).css({backgroundPosition: '-348px -75px'});
	    }
	);
}