function rolloverOn(id,lt) {
   var menu_off;
   menu_off = document.getElementById(''+id+'').style.background='url(../images/menu/bg_txt_puls_menu_v_roll_'+lt+'.png) no-repeat';
}

function rolloverOff(id,lt) {
   var menu_on;
   menu_on = document.getElementById(''+id+'').style.background='url(../images/menu/bg_txt_puls_menu_v_'+lt+'.png) no-repeat';
}

function cambiaSfondo(hover) { //cambia lo sfondo a tutte le altre tab
var menu = document.getElementById('menu');
var lis = menu.getElementsByTagName('li');
    for (var j = 0; j < lis.length; j++) {
		var a = lis[j].getElementsByTagName('a');
		a[0].style.backgroundPosition ='0 -30px';
		}
}
function ripristinaSfondo(hover) { //cambia lo sfondo a tutte le altre tab
var menu = document.getElementById('menu');
var lis = menu.getElementsByTagName('li');
    for (var j = 0; j < lis.length; j++) {
		var a = lis[j].getElementsByTagName('a');
		a[0].style.backgroundPosition ='0 0';
		}
}

//Events 
function addEvent(elm, evType, fn) {
// cross-browser event handling
if(elm.addEventListener) {
elm.addEventListener(evType, fn, false);
return true;
}
else if(elm.attachEvent) {
var r = elm.attachEvent('on'+evType,fn);
return r;
}
else {
elm['on'+evType] = fn
}
}

function addListeners(e) {
var menu = document.getElementById('menu');
var lis = menu.getElementsByTagName('li');
    for (var j = 0; j < lis.length; j++) {
		var a = lis[j].getElementsByTagName('a');
		addEvent(a[0],'mouseover',cambiaSfondo);
		addEvent(a[0],'mouseout',ripristinaSfondo);
		}
}

addEvent(window,'load',addListeners);