function rozwin(id){
	 /*check the element exists and can be accessed*/
	   // max - liczba elementów w menu
	   var max=8;	
	   if(document.getElementById && document.getElementById(id)){   
		   /*get hold of the element*/
		   var ele = document.getElementById(id); 
			
/*		   for(var i=1;i<max;i++) {
		   		if ('dz_'+i!=id)
					document.getElementById('dz_'+i).style.display="none"; 
			}
*/		   if(ele.style.display!="none"){   
			   ele.style.display="none";       
		   }else{
			   ele.style.display="block";     
		   }
	   }
	}