function validarEmail(valor) {
  if (/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(valor)){
    return (true)
  } else {
    alert("La dirección de email es incorrecta.");
    return (false);
  }
}

function mensaje(){
 alert('¡¡ Pagina en Construccion !!')
}

function ventanita(dir,nombre){
ventana=window.open(dir,nombre,'width=376,height=280,menubar=no,scrollbars=no,toolbar=no,location=no,directories=no,resizable=no,top=0,left=0');
}


function carga_images(){
 menu1=new Image(); 
 menu1.src="imagenes/menu1_on.gif";
 menu2=new Image(); 
 menu2.src="imagenes/menu2_on.gif";
 menu3=new Image(); 
 menu3.src="imagenes/menu3_on.gif"; 
 menu4=new Image(); 
 menu4.src="imagenes/menu4_on.gif"; 
 menu5=new Image(); 
 menu5.src="imagenes/menu5_on.gif";
 menu6=new Image(); 
 menu6.src="imagenes/menu6_on.gif"; 
 //alert('¡¡ Cargo!!')
}



<!--

function writeCookie (cookieName, cookieValue, cookiePath)
{
        var expDate = new Date();
        var expiry = 5 * 365 * 1000 * 60 * 60 * 24;
        var domain1 = ".aircanada.ca";
	var domain2 = ".aircanada.com";
	var address = location.hostname;
        expDate.setTime (expDate.getTime() + expiry);
        //document.cookie = cookieName + "=" + escape (cookieValue) + "; expires=" + expDate.toGMTString();

document.cookie = cookieName + "=" + escape (cookieValue) + "; path=" + cookiePath  + "; expires=" + expDate.toGMTString() + "; domain=" + domain2; //set cookie on .com

      
}



function consulta_vuelos(){
	nvuelo = document.form_vuelos.flightNumber.value;
	fvuelo = document.form_vuelos.flightDate.value;
	url ="http://book.aircanada.com/pl/AConline/en/OverrideServlet?USERID=GUEST&EXTERNAL_ID=GUEST&EMBEDDED_TRANSACTION=FlifoInfoServlet&SO_SITE_OFFICE_ID=YULAC18AB&LANGUAGE=US&COUNTRY=CA&SITE=SAADSAAD&TRIP_FLOW=YES&BOOKING_FLOW=NONE&PRIVATE_LABEL=ACO_AC_AIR&MARKET=CA&AIRLINE_CODE=AC&FLIGHT_NUMBER=" + nvuelo + "&B_DATE=" + fvuelo + "&x=48&y=7";
	ventana=window.open(url,"ventana_n_vuelos",'width=500,height=300,menubar=no,scrollbars=no,toolbar=no,location=no,directories=no,resizable=no,top=0,left=0');

}