function fontswitch_big() {
	
	//$('.switchable_ft').addClass('ft_big');
	$('.switchable_ft').addClass('ft_big');
	$('#zoomer').css('background-position','left top');
	$('#zoomer').hover(
		function() {
			$('#zoomer').css('background-position','-169px top');
		},
		function() {
			$('#zoomer').css('background-position','left top');
		}
	);

}

function fontswitch_small() {
	
	//$('.switchable_ft').removeClass('ft_big');
	$('.switchable_ft').removeClass('ft_big');
	$('#zoomer').css('background-position','-338px top');
	$('#zoomer').hover(
		function() {
			$('#zoomer').css('background-position','right top');
		},
		function() {
			$('#zoomer').css('background-position','-338px top');
		}
	);

}

function intro_flip_open(target) {
	var target1 = '#bt_' + target ;
	var target2 = '#' + target + '_intro';
	$(target1).css('background-position','left -74px');
	$(target1).hover(
		function() {
			$(target1).css('background-position','left bottom');
		},
		function() {
			$(target1).css('background-position','left -74px');
		}
	);
	$(target2).show('fast');
}

function intro_flip_close(target) {
	var target1 = '#bt_' + target ;
	var target2 = '#' + target + '_intro';
	$(target1).css('background-position','');
	$(target1).hover(
		function() {
			$(target1).css('background-position','');
		},
		function() {
			$(target1).css('background-position','');
		}
	);
	$(target2).hide('fast');
}