function scrollCanvas(dir){
	window.gal.scrollBy(dir,0);
	timer = setTimeout('scrollCanvas('+dir+')', 20);
}

function stopScroll(){
	clearTimeout(timer);
}

function changeImage(data){
	document.getElementById('foto').src = data.name;
	document.getElementById('legenda').innerHTML = '<br>'+data.title+'<br>&nbsp;';
}