function nayta(layeri)
{   

      if(document.layers)
		{    					// Selaintyyppi: NN 4             
		document.layers[layeri].visibility='visible'         
		}
         
	if(document.all)
		{ 					// Selaintyyppi: IE             
		kasiteltava = document.all[layeri];
		kasiteltava.style.visibility = 'visible'
		}
        
 	if(!document.all && document.getElementById)
		{					// Selaintyyppi: NN 6             
		document.getElementById(layeri).style.visibility = 'visible'
 		}

 } // End of function nayta

function piilota(layeri)
{   

      if(document.layers)
		{    					// Selaintyyppi: NN 4             
		document.layers[layeri].visibility='hidden'         
		}
         
	if(document.all)
		{ 					// Selaintyyppi: IE             
		kasiteltava = document.all[layeri];
		kasiteltava.style.visibility = 'hidden'
		}
        
 	if(!document.all && document.getElementById)
		{					// Selaintyyppi: NN 6             
		document.getElementById(layeri).style.visibility = 'hidden'
 		}

 } // End of function piilota