//-----------------------------------------------------
	//------  GESTIONE LAYER ------------------------------
	//-----------------------------------------------------
	var layeron = '';
	var detect = navigator.userAgent.toLowerCase();
			
	function switchlay(layin) {
		// Azzeramento dei vari layers 
		initlay();
		// Accensione del layer richiesto 
		if ((detect.search('mozilla') != -1) || (detect.search('firefox') != -1)){
			objnew=eval(layin+'.style');
			objnew.visibility='visible';
		}
		if (document.layers) {
			objnew=eval('document.'+layin);
			objnew.visibility='show';
		}
		layeron = layin;
		return;
	}
	//-----------------------------------------------------