var rotation_interval;
			rotation_interval = 3;
			
			function change_image(n) {			
				if(n!=1){				
  					
  					var counter = 1;
  					
  					function rotation() {
    					$('#teaser_block .teaser').stop().fadeOut('slow');     									
      					$($('#teaser_block .teaser').get(counter)).stop().fadeIn('slow');
    					counter == n-1 ? counter = 0 : counter++; 
  					} 					
  					var timer = setInterval(rotation, rotation_interval*1000);
  				}
			}
			
			function set_rotation_interval(n){
				rotation_interval = n;					
			}