function popup_url(url, size_w, size_h, scroll) {
	new_size_w = Number(size_w)+10;
	new_size_h = Number(size_h)+25;
	popup_left = Math.round((screen.availWidth-new_size_w)/2);
	popup_top = Math.round((screen.availHeight-new_size_h)/2);
	msg=open(url,"POPUP","scrollbars="+scroll+",toolbar=no,directories=no,width="+size_w+",height="+size_h+",menubar=no, top="+popup_top+", left="+popup_left+"");
	msg.document.close();
	msg.focus();
};

function validateform() {
	for(var i=0; i<fields.length; i++) {
  		if (document.f.elements[fields[i]].value == '' || 
  			document.f.elements[fields[i]].value == 0 
  			) {
   			alert(fields_info[i]);
   			document.f.elements[fields[i]].focus();
   			return false;
  		}
 	}
	
	if(document.f.elements['email']) {
		if(!validateemail(document.f.elements['email'].value))
 			return false;
	}
 	return true;
}

function validateemail(t) {
  maska = /^[\w-\.]+\@[\w\.-]+\.[a-z]{2,4}$/;
  if (maska.test(t)==false) { 
    alert("Podaj poprawny adres e-mail");
    document.f.elements['email'].focus();
    return false;
  }
  return true;
}


function validatekod(t) {
	maska = /^\d\d\-\d\d\d$/
	if (maska.test(t)==false) { 
    	alert("Podaj poprawny kod pocztowy");
    	document.f.elements['kod_pocztowy'].focus();
    	return false;
  	}
  	return true;
}

function oznacz_dostepnosc(t) {
	maska = /^[1-9]$/;
	if (maska.test(t)==false) { 
    	alert("Minimalna ilość dni 1.");
    	document.f.elements['iledni'].focus();
    	return false;
  	}
  	return true;
}