function sceglinavbar(valore){ 
bName = navigator.appName;
bVer = parseInt(navigator.appVersion);

				if (navigator.userAgent.indexOf('Win') != -1)
				{
				  if (bName == "Netscape" && bVer < 4.7)
				  {
					  str='layers[';
					  str1=']';
				  }
				  else
				  {
					  str='all.liv';
					  str1= '.style';
				  }
				}
				switch (valore) 
				{   
			    case "1" :  
						eval("document."+str+"5"+str1).visibility = "visible";
						eval("document."+str+"6"+str1).visibility = "visible";
					 	  break; 
				case "2" :  
						eval("document."+str+"7"+str1).visibility = "visible";
						eval("document."+str+"8"+str1).visibility = "visible";
					 	    break;
				case "3" :  
						eval("document."+str+"9"+str1).visibility = "visible";
						eval("document."+str+"10"+str1).visibility = "visible";
					 	    break;
				case "4" :  
						eval("document."+str+"1"+str1).visibility = "visible";
					 	  break; 
				case "5" :  
						eval("document."+str+"2"+str1).visibility = "visible";
					 	  break; 
				case "6" :  
						eval("document."+str+"3"+str1).visibility = "visible";
					 	  break; 
				case "7" :  
						eval("document."+str+"11"+str1).visibility = "visible";
					 	  break;
				case "8" :  
						eval("document."+str+"13"+str1).visibility = "visible";
					 	  break;
				default :    alert ("Generata Eccezione."); 
				} 
}

function sceglinavbar_hb(valore){
off_all_lay();
centralayer_hb();
switch (valore) {   
			    case "1" :
						document.getElementById('liv1').style.visibility = "visible";
						document.getElementById('liv4').style.visibility = "visible";
						document.getElementById('liv7').style.visibility = "visible";
						document.getElementById('liv12').style.visibility = "visible";
					 	  break; 
				case "2" : 
						document.getElementById('liv2').style.visibility = "visible";
						document.getElementById('liv5').style.visibility = "visible";
						document.getElementById('liv7').style.visibility = "visible";
						document.getElementById('liv12').style.visibility = "visible";
					 	    break;
				case "3" :  
						document.getElementById('liv6').style.visibility = "visible";
						document.getElementById('liv3').style.visibility = "visible";
						document.getElementById('liv7').style.visibility = "visible";
						document.getElementById('liv12').style.visibility = "visible";
					 	    break;
				case "4" :  
						document.getElementById('liv1').style.visibility = "visible";
						document.getElementById('liv12').style.visibility = "visible";
					 	  break; 
				case "5" :  
						document.getElementById('liv2').style.visibility = "visible";
						document.getElementById('liv12').style.visibility = "visible";
					 	  break; 
				case "6" :  
						document.getElementById('liv3').style.visibility = "visible";
						document.getElementById('liv12').style.visibility = "visible";				
					 	  break; 
				case "7" :  
						document.getElementById('liv11').style.visibility = "visible";
						document.getElementById('liv12').style.visibility = "visible";	
					 	  break;
				default :    alert ("Generata Eccezione."); 
				} 
}



function off_all_lay() {
document.getElementById('liv1').style.visibility = "hidden";
document.getElementById('liv2').style.visibility = "hidden";
document.getElementById('liv3').style.visibility = "hidden";
document.getElementById('liv4').style.visibility = "hidden";
document.getElementById('liv5').style.visibility = "hidden";
document.getElementById('liv6').style.visibility = "hidden";
document.getElementById('liv7').style.visibility = "hidden";
document.getElementById('liv12').style.visibility = "hidden";
	}
	
function off_offerte(){
document.getElementById('liv8').style.visibility = "hidden"
}

function on_offerte(){
document.getElementById('liv8').style.visibility = "visible"

}