my pages has a a4j:commandButton,when the action method execut,it appear excetion,this page will show
Request error,status:500 Internal Server Error
Message:undefined
i want to deal it ,so in my page, use A4J.AJAX.onError()
A4J.AJAX.onError = function(req,status,message) {
alert('error');
};
A4J.AJAX.onExpired = function(loc,expiredMsg){
alert('error2');
} ;
but it not execut, still show
Request error,status:500 Internal Server Error
Message:undefined
why? who can tell me ??
thanks very much!!