function blok()
{
 var lista = document.getElementsByTagName('div');
 for(i=0;i<lista.length;i++) {
 	lista[i].style.display = "none";
	}
}
function OpenWin(par)
{
			url = par;
		window.open(url,"Szyszka","menubar=no,toolbar=no,status=no,top=0,left=400,resizable=yes,scrollbars=yes,width=500,height=450");
	}

function OpenJalowiec(par)
{
			url = par;
		window.open(url,"Jalowce","menubar=no,toolbar=no,status=no,top=0,left=200,resizable=yes,scrollbars=yes,width=800,height=650");
	}
function pokaz(pole)
{

var div_j = document.getElementById(pole);

  if (div_j) // czy istnieje taki div
     {
	 if (div_j.style.display == "none")
          div_j.style.display = "block";
  	else
	div_j.style.display = "none";
	}
}