var ost="w.poczatkowa"
var li=0

function ReverseContent(d)
{

  if (d.length < 1)
    return;

  if (document.getElementById(d).style.display == "none")
  {
	if(d!==ost && li!==0) { 
   	  document.getElementById(ost).style.display = "none";
 	   	  		}
 	   	  		
 	  document.getElementById(d).style.display = "block";
 	  ost=d;
 	  li++;

   }
   
  else
  {
    document.getElementById(d).style.display = "none";
  }


}