var all_images = ['a','b','c','d','e','f','g','h'];
var current_folder = read_cookie('folder');
var is_bw = false;

function new_background(folder) {
    return false;
    var location = "'http://www.chicagophotographyacademy.com/img/";

    var count = 0;
    if (is_bw) {
        folder = parseInt(folder) + 4;
    }

    var main_box = getElement("box_all");
    var copy_box = getElement("box_main_copy");
    //var image_box = getElement("image_sidebar");
    var menu_box = getElement("box_menu_bar");
    var h3_array = document.getElementsByTagName("h3");
    var link_array = document.getElementsByTagName("a");

    for (count = 0; count < h3_array.length; count++) {
        h3_array[count].style.backgroundImage = "url(" + location + all_images[folder] + "/dark.jpg')";
    }

    for (count = 0; count < link_array.length; count++) {
        if(link_array[count].className == "schedule") {
            link_array[count].style.backgroundImage = "url(" + location + all_images[folder] + "/dark.jpg')";
        }
    }

    //main_box.style.backgroundImage = "url(" + location + all_images[folder] + "/sharp.jpg')";
    //copy_box.style.backgroundImage = "url(" + location + all_images[folder] + "/blur.jpg')";
    //image_box.style.backgroundImage = "url(" + location + all_images[folder] + "/blur.jpg')";
    //menu_box.style.backgroundImage = "url(" + location + all_images[folder] + "/blur.jpg')";
    if (typeof document.body.style.maxHeight == "undefined") {
        var header_box = getElement("box_header");
        header_box.style.backgroundImage = "url(" + location + all_images[folder] + "/header_ie6.png')";
    }

    if (folder > 3) {
        document.image1.src = "http://www.chicagophotographyacademy.com/img/f/thumb.jpg";
        document.image2.src = "http://www.chicagophotographyacademy.com/img/g/thumb.jpg";
        document.image3.src = "http://www.chicagophotographyacademy.com/img/h/thumb.jpg";
    } else {
        document.image1.src = "http://www.chicagophotographyacademy.com/img/b/thumb.jpg";
        document.image2.src = "http://www.chicagophotographyacademy.com/img/c/thumb.jpg";
        document.image3.src = "http://www.chicagophotographyacademy.com/img/d/thumb.jpg";
    }

    create_cookie('folder', folder, 365);
    current_folder = folder;
    //play_shutter();
    return false;
}

function check_cookie() {
    // check if there is a cookie
    var folder = read_cookie('folder');

    // if there is we need to get the
    // folder number for the background image
    if (folder!=null && folder!=0) {
        new_background(folder);
    }
}

function create_cookie(name,value,days) {
	if (days) {
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}

function read_cookie(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') {
		    c = c.substring(1,c.length);
		}
		if (c.indexOf(nameEQ) == 0) {
		    return parseInt(c.substring(nameEQ.length,c.length));
		}
	}
	return 0;
}

function cycle_images() {
    if (current_folder > 3) {
        is_bw = true;
    }
    if (is_bw) {
        is_bw = false;
        current_folder = current_folder - 4;
    } else {
        is_bw = true;
    }
    new_background(current_folder);
}