function gid (id)
{
    return document.getElementById(id);
}

function isMail (mail)
{
    var regExp = new RegExp("[A-Za-z0-9_]+([-+.][A-Za-z0-9_]+)*@[A-Za-z0-9_]+([-.][A-Za-z0-9_]+)*\\.[A-Za-z0-9_]{2,}([-.][A-Za-z0-9_]+)*");
    var result = regExp.exec(mail);
    return (null == result) ? false : true;
}

function isNotEmpty (value)
{
    var regExp = new RegExp("(.)+");
    var result = regExp.exec(value);
    return (null == result) ? false : true;
}

function validation ()
{
    var errors = '';
    if (false === isNotEmpty(gid('name').value)) {
        errors += "Please enter Name\n";
	}
	
    if (false === isMail(gid('email').value)) {
        errors += "Please enter E-mail address\n";
	}

	$.get("php/check_antibot.php?sec_code=" + $('#sec_code').val(), function(data){
        if ('f' == data){
            errors += "Please enter valid Captcha\n";
        }
        if ('' != errors) {
            alert(errors);
            return false;
        } else {
            $('form').submit();
        }
    });
    return false;
}