function EValido($aux){
      $proibidos = array("\"","'","%","=");
      $iproibidos = array(" like","like "," or","or "," and","and "," from",
                          "from "," drop","drop "," delete","delete ","login",
                          "teste","acesso","senha","email");
      if($aux=="")
         return False;
      foreach($proibidos as $vlr){
         if(ereg($vlr,$aux))
            return False;
      }
      foreach($iproibidos as $vlr){
         if(eregi($vlr,$aux))
            return False;
      }
      return True;
   }