function reg_mail() {
	var mail = $("form input#mail").val();
	if ( /[0-9a-zA-Z\-_\.]+@[0-9a-zA-Z\-\.]+\.[a-z]{2,4}/.test(mail) ){
	$.get( "/subscribe.php", "mail="+mail, function(data, textStatus, XMLHttpRequest){
		if (data=="OK") {
			$("form").fadeOut(500, function(){ $("p#subscribed").fadeIn(500); });
		}
	}, "text" );
	} else {
		$("form input#mail").stop(true,true).focus().css('background-color','#f33');
		$("form input#mail").animate({ backgroundColor: "white"}, 3000);
	}
}