function emailCheck()
{
    var f = document.all.sform;
    var errMessage = "";
    if (f.email.value)
    {
        if (/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,4})+$/.test(f.email.value)){  }else{ errMessage += "Ââåäèòå ïðàâèëüíûé e-mail." }
    }
    else
    {
        errMessage += "Ââåäèòå e-mail."
    }
    if(!errMessage)
	{
		return true;
	}
	else
	{
		alert(errMessage);
		return false;
	}
}