var scrolling = 0;
var slider = null;

function switchCategoryPhoto(link){
	var photo_div = document.getElementById('top_img');
	photo_div.style.backgroundImage = 'url("galeria/orginalne/'+link+'")';
}

function switchProductPhoto(img, title){
	var photo = document.getElementById('middle_img');
	photo.style.backgroundImage = 'url("'+img+'")';
	photo.title = title;
}

function startScrolling(dir){
	slider = document.getElementById('slider');
	scrolling = dir * 1;
	setTimeout("scroll();",10);
}

function scroll(){
	if (scrolling != 0){
		slider.scrollLeft += scrolling;
		setTimeout("scroll();",10);
	}
}