function changeSrc(el,img){
	if(el!=null){
		el.src=img;
	}
}

function changeTlo(el,tlo){
	if(el!=null){
		el.className=tlo;
	}
}

function czy_usun(linkp,komunikat){
	if(confirm(komunikat)){
		location.href=linkp;
	}
}


function zaznacz_checkboxy(formularz,tablica,statusel) {
	var elts=(typeof(formularz.elements[tablica+'[]'])!= 'undefined') ? formularz.elements[tablica+'[]'] : '';
	var elts_cnt = (typeof(elts.length) != 'undefined') ? elts.length : 0;
	if (elts_cnt){
		for (var i = 0; i < elts_cnt; i++){ 
		 	elts[i].checked=statusel;
		}
  } else { 
		elts.checked = statusel;
	}
}


function dodajtag(FormName,FieldName,tag,prompttext) {
	if (tag=='b'){ tag_prompt='bold'; }
	if (tag=='i'){ tag_prompt='italic'; }
	inserttext = prompt(prompttext+'\n<'+tag+'>xxx</'+tag+'>','');
	if ((inserttext != null) && (inserttext != '')) {
		document.forms[FormName].elements[FieldName].value += '<'+tag+'>'+inserttext+'</'+tag+'>';
	}
	document.forms[FormName].elements[FieldName].focus();
}

function emotikony_obrazek(pole,znaczek) {
  emotikony_pole=document.getElementById(pole);
  emotikony_pole.value=emotikony_pole.value+znaczek;
  emotikony_pole.focus();
}


function popup_image(okno,imageURL,imageTitle,w,h,margines){

	if(margines==''){
		$margines=0;
	}

	w=w+(2*margines);
	h=h+(2*margines);
	
	PositionY=(screen.height-h)/2; 
	if (PositionY<0){
		PositionY=0;
	}
	
	PositionX=(screen.width-w)/2; 
	if (PositionY<0){
		PositionY=0;
	}	
	
	
  var imgWin = window.open('',okno,'scrollbars=no,resizable=1,width='+w+',height='+h+',left='+PositionX+',top='+PositionY);
	//popup blockers should not cause errors
  if( !imgWin ) { 
		return true; 
	}

	imgWin.moveTo(PositionX,PositionY);
	imgWin.resizeTo(w,h);	
  imgWin.document.write('<html><head><title>'+imageTitle+'<\/title><\/head><body style="margin:0px; padding:0px; text-align:center"><div style="padding:'+margines+'px">'+'<img src="'+imageURL+'" alt=\"\" style=\"cursor:pointer\" onclick=\"window.close();\" />'+'<\/div><\/body><\/html>');
	
	imgWin.document.close();	
	
  if( imgWin.focus ) { 
		imgWin.focus(); 
	}

}

function popup_open(okno,adres,w,h,margines) {

	if(margines==''||!margines||margines=='undefined'||isNaN(margines)){
		margines=0;
	}

	w=w+margines;
	h=h+margines;

	top_okno=(screen.height-h)/2; 
	if (top_okno<0){
		top_okno=0;
	}
	left_okno=(screen.width-w)/2; 
	
	if (left_okno<0){
		left_okno=0;
	}

	imgWin=window.open(adres,okno,'top='+top_okno+',left='+left_okno+',width='+w+',height='+h+',toolbar=no,menubar=no,location=no,directories=no,alwaysRaised=no,status=no,scrollbars=no,resizable=yes,fullscreen=0');
	
	imgWin.moveTo(left_okno,top_okno);
	imgWin.resizeTo(w,h);	
			
	//popup blockers should not cause errors
  if( !imgWin ) { 
		return true; 
	}		
	
  if( imgWin.focus ) { 
		imgWin.focus(); 
	}

} 

function spr_email(email){
	var forma_email=/^(?:(?:\w\-*)+\.?)*\w+@(?:(?:\w\-*)+\.)+\w{1,4}$/;
	return forma_email.test(email);
}

function spr_slowakluczoweHurt(email){
	var forma_email=/^([0-9a-zA-ZąćęłńóśźżĄĆĘŁŃÓŚŹŻ\-\.`]+( [0-9a-zA-ZąćęłńóśźżĄĆĘŁŃÓŚŹŻ\-\.`]+)*(,| ,| , |, ){1}\d+((,| ,| , |, ){1}\d+)*;\s*)*$/;
	return forma_email.test(email);
}

String.prototype.trim=function(){
	return this.replace(/^\s*|\s*$/g,"");
}

function szczegoly(nr){
	if(nr){
		element=document.getElementById(nr);
		if(element){
			if(element.style.display=='none'){
				element.style.display='';
			} else {
				element.style.display="none";
			}
		}
	}
}


