<!--
//browser detection
var ua="0";
var vers=navigator.appVersion;
if ((navigator.appName == "Microsoft Internet Explorer") && (navigator.appVersion.substring(0,1) >= 4))
 ua="ie4";
if ((navigator.appName == "Netscape") && (navigator.appVersion.substring(0,1) >= 4))
 ua="ns4";

var imgSwitched="";  
		  
function rollon2(imgName) {
	if((imgSwitched != imgName)&&(imgSwitched+'b' != imgName)) {
        if ((ua == "ns4")||(ua == "ie4")) 
        	document[imgName].src = eval(imgName + "_on.src");
    }
}

function rollon(imgName) {
	if((imgSwitched != imgName)&&(imgSwitched+'b' != imgName)) {
        if ((ua == "ns4")||(ua == "ie4"))
        {
        	if(document.getElementById(imgName).src != eval(imgName + "_switch.src"))
        	{
        	document.getElementById(imgName).src = eval(imgName + "_on.src");
        	}
        }
    }
}

function rolloff2(imgName) {
	if((imgSwitched != imgName)&&(imgSwitched+'b' != imgName)&&(imgSwitched+'top' != imgName)&&(imgSwitched+'left' != imgName)) {
        if ((ua == "ns4")||(ua == "ie4")) 
        	document[imgName].src = eval(imgName + "_off.src");
    }
}

function rolloff(imgName) {
	if((imgSwitched != imgName)&&(imgSwitched+'b' != imgName)&&(imgSwitched+'top' != imgName)&&(imgSwitched+'left' != imgName)) {
        if ((ua == "ns4")||(ua == "ie4"))
        { 
            if(document.getElementById(imgName).src != eval(imgName + "_switch.src"))
        	{
        	document.getElementById(imgName).src = eval(imgName + "_off.src");
        	}
        }
    }
}

function switchMenuSx(imgName) {
	if ((ua == "ns4")||(ua == "ie4")) 
    	document[imgName].src =  eval(imgName + "_switch.src");
}


// preload immagini menu
		home_off = new Image();
		home_off.src = "/images/header/home.gif";
		home_on = new Image();
        home_on.src = "/images/header/home_over.gif";
		home_switch = new Image();
        home_switch.src = "/images/header/home_switch.gif";        
        
        world_off = new Image();
        world_off.src="/images/header/world.gif";
        world_on = new Image();
        world_on.src = "/images/header/world_over.gif";
        world_switch = new Image();
        world_switch.src = "/images/header/world_switch.gif";

        mail_off = new Image();
        mail_off.src="/images/header/mail.gif";
        mail_on = new Image();
        mail_on.src = "/images/header/mail_over.gif";
        mail_switch = new Image();
        mail_switch.src = "/images/header/mail_switch.gif";                       

            
//-->