var currentPage = 0;
var nextPage = 0;

$(document).ready(function() {
	frontpage_image_resize();
	$(window).resize(frontpage_image_resize);
    $('#copyPageTwo').css({opacity: 0});	
	$('#pageBtnWrapper a').click(function(e) {
	    e.preventDefault();
	    showPage(nextPage);
	});
});

function frontpage_image_resize() {
	var frontpage_image = $("#frontPageImage img");
	var w = frontpage_image.attr("width");
	var h = frontpage_image.attr("height");
	var r = w/h;
	var window_w = $(window).width();
	var window_h = $(window).height();
	var window_r = window_w/window_h;
	var new_w; var new_h;
	if (window_r >= r) {
		new_w = window_w;
		new_h = window_w/r;
	} else {
		new_w = window_h*r;
		new_h = window_h;
	}
	if(new_h < 700) {
	    new_h = 700;
	    new_w = 1120;
	} 
	topPosition = (window_h - 525) / 2;
	if(topPosition < 1) {
	    topPosition = 0;
	}
	frontpage_image.attr("width", new_w);
    frontpage_image.attr("height", new_h);
    $('#copyWrapper').css({'padding-top': topPosition+'px'});
	if(window_w < new_w) {
        offset = (new_w - window_w) / 2;
        $("#frontPageImage img").css({'margin-left': '-'+offset+'px'});
    } else {
        $("#frontPageImage img").css({'margin-left': '0px'});
    }
}

function showPage(currentPage) {
    if(currentPage == 0) {
        nextPage = 1;
        $('#pageBtnWrapper a').addClass('prev');
        $('#pageBtnWrapper a').html('Previous');
    } else if(currentPage == 1) {
        nextPage = 0;
        $('#pageBtnWrapper a').removeClass('prev');
        $('#pageBtnWrapper a').html('Next');
    }
    $('#copyWrapper div').stop(true, true);
    $('#copyWrapper div:eq('+currentPage+')').animate({opacity: 0}, {
        duration: 800,
        queue: false,
        easing:"easeOutExpo"
    });
    setTimeout(function() {
        $('#copyWrapper div:eq('+nextPage+')').animate({opacity: 1}, {
            duration: 800,
            queue: false,
            easing:"easeOutExpo"
        });
    }, 100);
}