function setSearchVisible(n)
{	for(i=0 ; i<4 ; i++)
	{	document.getElementById("search_" + i).className = (n==i) ? "search_sel" : "search_unsel";
		document.getElementById("search_td_" + i).style.display = (n==i) ? "" : "none";
	}
}

function chkMail()
{	var myRe = /^[A-Z0-9_.-]+@[A-Z0-9_.-]+$/ig; 
	var o = document.getElementById("mail");

	o.value = o.value.replace(/(^\s*)|(\s*$)/g, "");
	if (!myRe.test(o.value))
	{	alert("Błędny adres e-mail. Popraw.\n");
		return false;
	}
	else
	{	return true;
	}
}