// JavaScript Document

	var currentMainPhotoId = 1;
	function changeMainPhoto(id, clickedAnchor){
		if(id != currentMainPhotoId){
			$('#mainPhoto'+currentMainPhotoId).fadeOut('slow');
			$('#mainPhoto'+id).fadeIn('slow');
			currentMainPhotoId = id;
		}
		
		$('#mainPhotoNav li a').removeClass('selected');
		$(clickedAnchor).addClass('selected');
		
		$('#mainPhotoNav li a').each(function(i){
			if(i+1 == currentMainPhotoId){
				$(this).addClass('selected');
			}
		});
	}
	
	function getNextMainPhotoId(){
		var nextId = null;
		if(currentMainPhotoId == 3){
			nextId = 1;			
		} else {
			nextId = currentMainPhotoId + 1;
		}
		
		return nextId;
	}
	
	var currentNewsId = 1;
	function showPrevNews(count){
		$('#newsBox .news' + currentNewsId).addClass('hidden');
		
		if(currentNewsId == 1){			
			currentNewsId = count;
		} else {
			currentNewsId = currentNewsId - 1;
		}
		$('#newsBox .news' + currentNewsId).removeClass('hidden');		
	}
	
	function showNextNews(count){
		$('#newsBox .news' + currentNewsId).addClass('hidden');
		
		if(currentNewsId == count){			
			currentNewsId = 1;			
		} else {
			currentNewsId = currentNewsId + 1;
		}
		$('#newsBox .news' + currentNewsId).removeClass('hidden');			
	}
	
	function isEMailAddr(elem) {
		var str = elem.value;
		var re = /^[\w-]+(\.[\w-]+)*@([\w-]+\.)+[a-zA-Z]{2,7}$/;
		if (!str.match(re)) {
			alert("Sprawdź poprawność adresu email!");
			return false;
		} else {
			return true;
		}
	}