var b = new Array(); 


b[0] = new Image(); 
b[0].src = "images/mitte_top_1.jpg"; 

b[1] = new Image(); 
b[1].src = "images/mitte_top_2.jpg"; 

b[2] = new Image(); 
b[2].src = "images/mitte_top_3.jpg"; 

b[3] = new Image(); 
b[3].src = "images/mitte_top_4.jpg";

b[4] = new Image(); 
b[4].src = "images/mitte_top_5.jpg";


var random_number_2 = Math.ceil(((12 * Math.random()) / 2)-1);



function set_pictures(){
	
	if(random_number_2 == 0){
	
		random_number_2 = 1;
		}

   document.top_show.src = b[random_number_2].src; 
} 


function show(itemName) {	
	
		document.getElementById(itemName).style.display = 'block';				
		}
		

function hide(itemName) {	

		document.getElementById(itemName).style.display = 'none';							
		}