function next_project(part){
	if(part == 'upper'){
		var prev_id = current_project - 1;
		var previous_pr = projects[prev_id];
		if(current_project == projects.length){
			current_project = 1;
		}else{
			current_project += 1;
		}
		var next_id = current_project - 1;
		var next_pr = projects[next_id];
		new Effect.Fade(previous_pr);
		new Effect.Appear(next_pr, {queue: 'end'});
		
	}else{
		var prev_id2 = current_project2 - 1;
		var previous_pr2 = projects2[prev_id2];
		if(current_project2 == projects2.length){
			current_project2 = 1;
		}else{
			current_project2 += 1;
		}
		var next_id2 = current_project2 - 1;
		var next_pr2 = projects2[next_id2];
		new Effect.Fade(previous_pr2);
		new Effect.Appear(next_pr2, {queue: 'end'});
	}

/*	new Effect.Parallel(
    [ 	new Effect.Fade(previous_pr), 
      	new Effect.Fade(previous_pr2)], {
     afterFinish: function(effect){
     new Effect.Parallel(
    [ 	new Effect.Appear(next_pr), 
      	new Effect.Appear(next_pr2)])
     }
      	 });
*/	
	
	var timer = setTimeout("next_project('"+part+"')", 8000);
	
}