function reload(form,loc){
	var val = form.country.options[form.country.options.selectedIndex].text;
  	self.location = loc + '?country=' + val ;
}
function error_check() {
	// checking country
	if (document.forms['query'].elements['country'].value == ''){
		alert('Proszę wybrać kraj'); 
		document.forms['query'].elements['country'].focus();
		return false;
	}
	// checking network
	if (document.forms['query'].elements['network'].value == ''){
    	alert('Proszę wybrać sieć'); 
      	document.forms['query'].elements['network'].focus();
       	return false;
	}
	// checking model
	if (document.forms['query'].elements['model'].value == ''){
       	alert('Proszę wybrać model'); 
       	document.forms['query'].elements['model'].focus();
       	return false;
	}
	// checking serial 
	var ver = document.query.ver.value;
	if (ver == 'advanced') {
		var serial = document.forms['query'].elements['serial'].value;
		var RegExPattern = /^\d{5}$/;
		if ((!serial.match(RegExPattern)) || (serial='')) {
			alert('Wprowadź poprawny 5 cyfrowy serial');
			document.forms['query'].elements['serial'].focus();
			return false;
		}
	}
	// checking imei
	var imei_entered = document.forms['query'].elements['imei'].value;
	var RegExPattern = /^\d{15}$/;
    if ((!imei_entered.match(RegExPattern)) || (imei_entered='')) {
		alert('Wprowadź poprawny 15 cyfrowy numer IMEI');
		document.forms['query'].elements['imei'].focus();
		return false;
	}
}

function email_check (){
	// checking email 
	var str = document.forms['query'].elements['email'].value; 
	var reg1 = /(@.*@)|(\.\.)|(@\.)|(\.@)|(^\.)/; // not valid
    var reg2 = /^.+\@(\[?)[a-zA-Z0-9\-\.]+\.([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$/; // valid
    if (reg1.test(str) || !(reg2.test(str))) { 					// if syntax is not valid
		alert("\"" + str + "\" jest nieprawidłowym adresem email!"); 
		document.forms['query'].elements['email'].focus();
		return false;
	}
}

function last_mod () {

                var days = new Array(8);

                days[1] = "Niedziela";

                days[2] = "Poniedziałek";

                days[3] = "Wtorek";

                days[4] = "Środa";

                days[5] = "Czwartek";

                days[6] = "Piątek";

                days[7] = "Sobota";

                var months = new Array(13);

                months[1] = "Styczeń";

                months[2] = "Luty";

                months[3] = "Marzec";

                months[4] = "Kwiecień";

                months[5] = "Maj";

                months[6] = "Czerwiec";

                months[7] = "Lipiec";

                months[8] = "Sierpień";

                months[9] = "Wrzesień";

                months[10] = "Październik";

                months[11] = "Listopad";

                months[12] = "Grudzień";

                var dateObj = new Date(document.lastModified)

                var wday = days[dateObj.getDay() + 1]

                var lmonth = months[dateObj.getMonth() + 1]

                var date = dateObj.getDate()

                var fyear = dateObj.getYear()

                if (fyear < 2000) 

                fyear = fyear + 1900

                document.write(wday + ", " + date + " " + lmonth + ", " + fyear)

}