function sprawdz_pola(jaki_form) {

		if (jaki_form == 'dlugi') {
			tab = ['user_mail', 'user_first_name', 'user_last_name','user_adress','user_city','user_postcode','user_phone','user_birdth'];
			var i2 = '';
	
			if (document.getElementById('fak').checked == true) {
				var a = tab.length;
				tab[a+0] = ['fak_firm'];
				tab[a+1] = ['fak_nip'];
				tab[a+2] = ['fak_adress'];
				tab[a+3] = ['fak_city'];
				tab[a+4] = ['fak_postcode'];
	}
	
		} else {
			tab = ['user_mail'];
			var i2 = '';

		}
		
		for(i=0;tab.length>i;i++) {

			if (document.getElementById(tab[i]).value == '') {
				document.getElementById(tab[i]+'_ramka').style.border='2px solid #CA2800';
				i2 += 1;
			} else {
				document.getElementById(tab[i]+'_ramka').style.border='none';
			}
		}
		
		
		if (i2 == '') {
			if (isValidEmail(document.getElementById('user_mail').value) == true) {
				return true;
			} else {
				document.getElementById('user_mail_ramka').style.border='2px solid #CA2800';
				document.getElementById('error').style.display='none';
				document.getElementById('error2').style.display='block';
				return false;
			}



		} else {
			document.getElementById('error2').style.display='none';
			document.getElementById('error').style.display='block';
			return false;
		}

}
function isValidEmail(str) {
   return (str.indexOf(".") > 0) && (str.indexOf("@") > 0);
}