function checker(container, item, step) {
	try {
		counter = 1;
		items = document.getElementById(container).getElementsByTagName('div');
		for(i = 0; i < items.length; i++){
			if(items[i].className == item) {
				if(counter == step) {
					items[i].style.marginRight = '0';
					counter = 1;
				}
				else
					counter++;
			}
		}
	}
	catch(e) {
	}
}