var layeron = '';
var detect = navigator.userAgent.toLowerCase();

function initlay() {
	initlay(-1);
}

function initlay(indexToInit) {
	if(indexToInit==-1){
	  // Layers: there would be one for each layer present into the page
	  if ((detect.search('mozilla') != -1) || (detect.search('firefox') != -1)){
	    for(i=0; i<document.all.length; i++){
	      if(document.all[i].id.search('prodListDiv_')!=-1)
	        document.all[i].style.visibility = 'hidden';
	    }
	  }
	  if (document.layers) {	
	    for(i=0; i<document.layers.length; i++){
	      if(document.layers[i].id.indexOf('prodListDiv_')!=-1)
	        document.layers[i].style.visibility = 'hide';
	    }
	  }
	}else{
	  indexToInitS = ""+indexToInit;
	  lastChar = indexToInitS.substring(indexToInitS.length-1);
	  if(lastChar == "1"){
	    indexToInitS = indexToInitS.substring(0, indexToInitS.length-1)+"0";
	  }
	  else{
	    indexToInitS = indexToInitS.substring(0, indexToInitS.length-1)+"1";
	  }
	  if ((detect.search('mozilla') != -1) || (detect.search('firefox') != -1)){
	    obj_1 = document.getElementById('prodListDiv_'+indexToInitS);
	    obj_1.style.visibility = 'hidden';
	  }
	  if (document.layers) {	
	    obj_1 = eval('document.prodListDiv_'+indexToInitS);
	    obj_1.visibility = 'hide';
	  }
	
	}
	var layeron = '';
	return;
}

function switchlay(layin) {
	// Azzeramento dei vari layers 
	initlay(parseInt(layin.substring(layin.indexOf('_')+1)));
	// Accensione del layer richiesto 
	if ((detect.search('mozilla') != -1) || (detect.search('firefox') != -1)){
	  objnew=document.getElementById(layin);
	  objnew.style.visibility='visible';
	}
	if (document.layers) {
	  objnew=eval('document.'+layin);
	  objnew.visibility='show';
	}
	layeron = layin;
	return;
}