function noAltTooltip(){ 
images = document.getElementsByTagName('img'); 
for (var i = 0; i < images.length; i++) 
{ 
var title = images[i].getAttribute('title'); 
var alt = images[i].getAttribute('alt'); 
if ((document.all) && (alt) && (!title)) 
{ 
images[i].setAttribute('title', ''); 
} 
} 
} 
// dodawanie zdarzen do funkcji 
function addEvent(obj, evType, fn){ 
if (obj.addEventListener){ 
obj.addEventListener(evType, fn, true); 
return true; 
} 
else if (obj.attachEvent){ 
var r = obj.attachEvent("on"+evType, fn); 
return r; 
} 
else { 
return false; 
} 
} 
addEvent(window, 'load', function(){ 
noAltTooltip(); 
});