var max_slide = 4;
var slider_pos = 0;
var old_slider_pos = 0;
var slider_timer;
var do_slide = true;
function slide_to_next() {
    if ( do_slide == false ) {
	return false; 
    }
    if ( slider_pos >= max_slide ) {
        slider_pos = 0;
    }
    
    $('#central_image_player_sub').animate(
                                            {opacity: 0.3},
					    650,
					    function () {
							$('#central_image_player_sub').css('left', 0 - slider_pos * 850);
							$('#thumb_' + slider_pos).animate(
											{opacity: 1},
											500
											);
							$('#central_image_player_sub').animate(
                                                                			       {opacity: 1},
											       650
											      );
					    }
					)
    $('#thumb_' + old_slider_pos).animate(
                                        {opacity: 0.3},
					500
					);
}
			
			
function slide_to(pos, automated) {
    clearInterval(slider_timer);
    old_slider_pos = slider_pos;
    slider_pos = pos;
    slide_to_next();
}
			
function auto_slide() {
    old_slider_pos = slider_pos;
    slider_pos++;
    slide_to_next();
}
			
			
$(window).ready(function() {
                    for ( i = 1; i < max_slide; i++ ) {
			$('#thumb_' + i).css('opacity', '0.3');
                    } 
                    });
$(window).load(function() {
                    slider_timer = setInterval(function() {auto_slide()}, 4000);
		    });