// funkcje wykorzystane w bloczku 'szukaj wiadomość'
function sw_search(formularz){

		// nie wybrano miesiąca - wyłączamy dropdowny działu i kategorii

	if(formularz.section.selectedIndex == 0){

		// nie wybrano działu - wyłączamy dropdown kategorii

		formularz.section.disabled = false;
		formularz.category.disabled = true;

		document.getElementById('arr_section').style.visibility = 'visible';
		document.getElementById('arr_category').style.visibility = 'hidden';
	}else{

		// wybrano miesiąc i dział, włączamy kategorię i wypisujemy opcje

		formularz.section.disabled = false;
		formularz.category.disabled = false;

		document.getElementById('arr_section').style.visibility = 'hidden';
		document.getElementById('arr_category').style.visibility = 'visible';
	}
}

function rewrite(formularz){
	// skasowanie bieżących opcji i wpisanie nowych
	for(i=formularz.category.options.length-1; i>=0; i--){
		formularz.category.options[i] = null;
	}

	var opt = new Option('wybierz kategorię', '-1');
	formularz.category.options[formularz.category.options.length] = opt;

	for(i=0; i<document.zm.length; i++){
		if(document.zm.elements[i].name.substring(5,8) == formularz.section.value.substring(1,4)){
			var opt = new Option(document.zm.elements[i].value, document.zm.elements[i].name.substring(4,14));
			formularz.category.options[formularz.category.options.length] = opt;
		}
	}
	
	if(formularz.category.options.length==0){
		var opt = new Option('brak kategorii', '-1');
		formularz.category.options[formularz.category.options.length] = opt;
		formularz.category.disabled = true;
	}
}

// funkcje wykorzystane w bloczku 'szukaj zdjęcie'
function sw_search2(formularz){
	if(formularz.section_photo.selectedIndex == 0){
		// nie wybrano miesiąca - wyłączamy dropdowny działu i kategorii

		formularz.category_photo.disabled = true;
		formularz.subcategory_photo.disabled = true;
		//formularz.send_photo.disabled = true;

		document.getElementById('arr_section_photo').style.visibility = 'visible';
		document.getElementById('arr_category_photo').style.visibility = 'hidden';
		document.getElementById('arr_subcategory_photo').style.visibility = 'hidden';
	}else{

		if(formularz.category_photo.selectedIndex == 0){

			// nie wybrano działu - wyłączamy dropdown kategorii

			formularz.category_photo.disabled = false;
			formularz.subcategory_photo.disabled = true;
			//formularz.send_photo.disabled = false;

			document.getElementById('arr_section_photo').style.visibility = 'hidden';
			document.getElementById('arr_category_photo').style.visibility = 'visible';
			document.getElementById('arr_subcategory_photo').style.visibility = 'hidden';
		}else{

			// wybrano miesiąc i dział, włączamy kategorię i wypisujemy opcje

			formularz.category_photo.disabled = false;
			formularz.subcategory_photo.disabled = false;
			//formularz.send_photo.disabled = false;

			document.getElementById('arr_section_photo').style.visibility = 'hidden';
			document.getElementById('arr_category_photo').style.visibility = 'hidden';
			document.getElementById('arr_subcategory_photo').style.visibility = 'visible';
		}
	}
}

function rewrite_categories_photo(formularz){
	// skasowanie bieżących opcji i wpisanie nowych
	for(i=formularz.category_photo.options.length-1; i>=0; i--){
		formularz.category_photo.options[i] = null;
	}

	var opt = new Option('wybierz kategorię', '-1');
	formularz.category_photo.options[formularz.category_photo.options.length] = opt;

	for(i=0; i<document.categories_photo.length; i++){
		if(document.categories_photo.elements[i].name.substring(6,9) == formularz.section_photo.value.substring(1,4) && document.categories_photo.elements[i].name.substring(9,12)!='000'  && document.categories_photo.elements[i].name.substring(12,15)=='000'){
			var opt = new Option(document.categories_photo.elements[i].value, document.categories_photo.elements[i].name.substring(5,15));
			formularz.category_photo.options[formularz.category_photo.options.length] = opt;
		}
	}
	
	if(formularz.category_photo.options.length==0){
		var opt = new Option('brak kategorii', '-1');
		formularz.category_photo.options[formularz.category_photo.options.length] = opt;
		formularz.category_photo.disabled = true;
	} else {
		if(formularz.section_photo.selectedIndex > 0){
			formularz.category_photo.disabled = false;
		}
	}
}

function rewrite_subcategories_photo(formularz){
	// skasowanie bieżących opcji i wpisanie nowych
	for(i=formularz.subcategory_photo.options.length-1; i>=0; i--){
		formularz.subcategory_photo.options[i] = null;
	}

	var opt = new Option('wybierz podkategorię', '-1');
	formularz.subcategory_photo.options[formularz.subcategory_photo.options.length] = opt;

	for(i=0; i<document.categories_photo.length; i++){
		if(document.categories_photo.elements[i].name.substring(6,9) == formularz.section_photo.value.substring(1,4)){
			if(document.categories_photo.elements[i].name.substring(9,12) == formularz.category_photo.value.substring(4,7) && document.categories_photo.elements[i].name.substring(12,15)!='000'){
				var opt = new Option(document.categories_photo.elements[i].value, document.categories_photo.elements[i].name.substring(5,15));
				formularz.subcategory_photo.options[formularz.subcategory_photo.options.length] = opt;
			}
		}
	}
	
	if(formularz.subcategory_photo.options.length==0){
		var opt = new Option('brak kategorii', '-1');
		formularz.subcategory_photo.options[formularz.subcategory_photo.options.length] = opt;
		formularz.subcategory_photo.disabled = true;
	} else {
		if(formularz.section_photo.selectedIndex > 0 && formularz.category_photo.selectedIndex > 0){
			formularz.subcategory_photo.disabled = false;
		}
	}
}

function sentered(urel, sizex, sizey){
 var posx = (screen.width / 2) - (sizex / 2);
 var posy = (screen.height / 2) - (sizey / 2);
 window.open(urel, 'okno', 'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=no,copyhistory=no,width=' + sizex + ',height=' + sizey + ',left=' + posx + ',top=' + posy);
 return false;
}

function sentered_noscroll(urel, sizex, sizey){
 var posx = (screen.width / 2) - (sizex / 2);
 var posy = (screen.height / 2) - (sizey / 2);
 window.open(urel, 'okno', 'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no,copyhistory=no,width=' + sizex + ',height=' + sizey + ',left=' + posx + ',top=' + posy);
 return false;
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.0
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && document.getElementById) x=document.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function is_email(email) {
  var emailPattern = /^[a-z0-9]+([_|-|.][a-z0-9]+)*\@([a-z0-9]+((-*)(.*)[a-z0-9]+)*\.(com|edu|biz|org|gov|int|info|mil|net|arpa|name|museum|coop|aero|[a-z][a-z])|(\[\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\]))$/;                     
  return emailPattern.test(email.toLowerCase());
}

function sprawdz_email(pole) {
  if (!is_email(pole.value)) {
    alert('Podany e-mail jest niepoprawny.');
    pole.focus();
    pole.select();
	return false;
  }
  return true;
}