// 
function sh(layName){
  if(document.layers)document.layers[layName].visibility='show'  //  IE4/IE5
  if(document.all)document.all(layName).style.visibility='visible' // NN4.x
  if(document.getElementById)document.getElementById(layName).style.visibility = "visible"; //NN6/IE5

}
function hd(layName){
  if(document.layers)document.layers[layName].visibility='hide'  //  IE4/IE5
  if(document.all)document.all(layName).style.visibility='hidden' // NN4.x
  if(document.getElementById)document.getElementById(layName).style.visibility = "hidden"; //NN6/IE5
}

function res(){
	for(var i=2;i<=8;i++){
	hd('ly'+i);
	}
	for(var j=1;j<=2;j++){
	hd('dly'+j);
	}
}

function on(num){
	for(var i=2;i<=8;i++){
		if(i!=num){
		hd('ly'+i);
		}
	}
sh('ly'+num);
	for(var j=1;j<=2;j++){
	sh('dly'+j);
	}
}