function abreManual ( manualID, prodID, action ){

	var URL = "./produtos/script.php?";

    if ( manualID ) URL += "manualID=" + manualID;

    if ( prodID   ) URL += "&prodID=" + prodID;

                    URL += "&action=" + action;

    window.open(URL,"manuais","scrollbars=NO,resizable=NO,directories=NO")

}