function pokazuj(elmnt)
{
document.getElementById(elmnt).style.visibility="visible";
}
function niepokazuj(elmnt)
{
document.getElementById(elmnt).style.visibility="hidden";
}


function zmienij(elem, rollover_color, text_color)
 {
  if (elem.parentNode)
	{
         if (rollover_color == 'transparent')
		{
                    elem.parentNode.bgColor = '';    
                }
            else{
                    elem.parentNode.bgColor=rollover_color;
                }
         }
    else if (elem.parentElement && elem.parentElement.setAttribute)
	    {
                elem.parentElement.setAttribute("bgColor", rollover_color);
            }
            else{
             ;
            }
 if (elem.children)
	    {
                elem.children(0).style.color=text_color;
            }
 }