function pokaz_ukryj(to_id){
			
			ten = document.getElementById(to_id);
			
			if ((ten.style.display == "block") || (ten.style.display == "")){
				ten.style.display = "none";
			}else if(ten.style.display == "none"){
				ten.style.display = "block";
			}
			}
			
			function pokaz_div(div_id){	
			 to = document.getElementById(div_id);
       	
			 if ((to.style.display == "none") || (to.style.display == "")){
          to.style.display = "block";
        }
			}