function sprawdz_pola() {


		tab = ['imie_nazwisko','miasto','datastartu','telefon','email','tresc'];
		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 == '') {
			return true;
		} else {
			document.getElementById('error').style.display='block';
			return false;
		}
		p=email.indexOf("@");
          if (p<1 || p==(email.length-1)) {
  			document.getElementById(tab['email']+'_ramka').style.border='2px solid #CA2800';
		  };

}