function hover_product (id, size) {
	
	var element = document.getElementById('show_' + id);
	var element2 = document.getElementById('hide_' + id);
	
	
	if (size == 'big') {
		if (element != null && element2 != null) {
			element.style.display = 'none';
			element2.style.display = 'block';
		}
	} else if (size == 'small') {
		if (element != null && element2 != null) {
			element.style.display = 'block';
			element2.style.display = 'none';	
		}
	}
}