function waliduj(id){
	document.getElementById(id).style.display='block';
}

function zmien(id1, id2, id3){
	document.getElementById(id1).style.display='block';
	document.getElementById(id2).style.display='none';
	document.getElementById(id3).style.display='none';
}

function lostFocus() {
	if (document.email.tresc.value == "") {
		document.email.tresc.style.setProperty('background','url(images/texta_bg.gif) no-repeat',null);
	}
}