if (navigator.appVersion.indexOf("2.") != -1){
	check = false;
	}
if ((navigator.appVersion.indexOf("3.") != -1) && (navigator.appName.indexOf("Explorer") != -1)){
	check = false;
	}
else {
	check = true;
}

function imageon(name){
        	document[name].src = eval(name + "on.src");
}
function imageoff(name){
        	document[name].src = eval(name + ".src");
}

function on(name){
        if (check == true){
	imageon(name);
	}
}
function off(name){
        if (check == true){
	imageoff(name);
	}
}