function openWi12(fi,na,w,h) {
 window.open(fi,na,"width="+w+",height="+h+",left=0,top=0,toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,favorites=no,resizable=yes");
}

function isEmpty(str) {
	return !( str != '' );
}
function checkform(f) 
{
messd=f.mess.value;
if( isEmpty(messd) ) { alert('Напишите сообщение!'); return false; }

emaild=f.email.value;
if( !isEmpty(emaild) ) {
var exclude=/[^@\-\.\w]|^[_@\.\-]|[\._\-]{2}|[@\.]{2}|(@)[^@]*\1/;
var check=/@[\w\-]+\./;
var checkend=/\.[a-zA-Z]{2,3}$/;
if(((emaild.search(exclude) != -1)||
(emaild.search(check)) == -1)||
(emaild.search(checkend) == -1)) {alert('Укажите правильный e-mail'); return false;}
else return true;
}
}

function show_nal(id_cur){var div_set=null;div_set=document.getElementById(id_cur);if (div_set!=null) {if (div_set.style.display=="block") div_set.style.display="none";else div_set.style.display="block";}}
function hide_elem(id) {var elem = null;elem=document.getElementById(id);if(elem != null) elem.style.display = "none";}