function show(midi, maxi, el) {
	mp = document.getElementById('mainPhoto');
	mp.href=maxi;
	mp.childNodes[0].src=midi;
	
	thumbs = el.parentNode.childNodes;
	
	for (i=0; i<thumbs.length; i++) {
		if(thumbs[i]==el) thumbs[i].className=(i==0)?'first active':'active';
		else thumbs[i].className=(i==0)?'first':'';
	}
	
	return false;
}

function validate(form) {
	msg = '';
	emailRE=/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,4})+$/; 

		
	if (form.name.value=='') msg +=" - Podaj imiê i nazwisko.\n";
	
	if (form.email.value=='' || !emailRE.test(form.email.value) ) msg +=" - Podaj poprawny adres email.\n";

	if (msg!='') {
		alert(msg);
		return false;
	}
	else return true;

}