function getStrErrAjax(status){

	var strStatus;
	
	switch(status){
		case 400:
			strStatus = "bad request";
			break;
		case 401:
			strStatus = "unauthorized";
			break;
		case 403:
			strStatus = "forbidden";
			break;
		case 404:
			strStatus = "página inexistente";
			break;
		case 408:
			strStatus = "request timeout";
			break;
		case 410:
			strStatus = "gone";
			break;
		case 500:
			strStatus = "internal server error";
			break;
		case 502:
			strStatus = "bad gateway";
			break;
		case 503:
			strStatus = "service anavailable";
			break;
        default:
            if (status.length > 0) {
                var s = status.substring(0, 1);
                if (s == "4") {
                    strStatus = "Client error";
                }
                else if (s == "5") {
                    strStatus = "Server error";
                }
                else {
                    strStatus = "Error: " + status;
                }    
		    }
		    else{
		        strStatus = "Error: " + status;
		    }
			
	}
	
	return strStatus;
	
}