$(document).ready(function(){
    var_length_of_slider = 0;
    //CONTROL THE BACK AND FORTH SLIDING FOR THE BOOKS
    $('#book_forward').click(function(){
		//get the left padding to do math
        var_left_padding = $("#book_slider").css('left');
		//get the number of books to thumb right through
        var_books_to_thumb_right_through = $('li.book_display').length - 5;
		//establish how many times we need to thumb through
		var_pages_to_thumb_right_through = Math.ceil(var_books_to_thumb_right_through/5);
        var_px_to_stop_thumb_right = -625 * var_pages_to_thumb_right_through
        var_px_to_stop_thumb_right = var_px_to_stop_thumb_right + "px";
        if(var_left_padding != var_px_to_stop_thumb_right){
            $('#book_slider').animate({'left': "-=625px"}, "fast");
        }
        return false;
    });

    $('#book_back').click(function(){
        var_left_padding = $("#book_slider").css('left');
        if(var_left_padding != "auto" && var_left_padding != "0px"){
            $('#book_slider').animate({"left": "+=625px"}, "fast");
        }
        return false;
    });

    /* BOOKS PAGE */
    //show the first items data and highlight it when you first arrive
    $('.book_info:first').show();
    $('.book_display:first').children().addClass('thumb_hover');
    
    //
    $('.book_display').click(function(){
        $('#book_slider .thumb').removeClass('thumb_hover');
		$('#book_slider .photo_thumb').removeClass('thumb_hover');
        $(this).children().addClass('thumb_hover');
        var_book_id = $(this).attr('book_id');
        $('.book_info').hide();
        $('#book_info_'+var_book_id ).show();
        return false;
    })
	
});