Hello, I have a problem with JSF2, and RichFaces ajax, Popup I have two, one in which I display a table with data and another that appears when I want to insert a new data by clicking on a button ... but I have a problem . In fact, before the data is inserted into the table I would like to check that this is not already present, if it is I have to display an error message, otherwise close the Popup used to enter the data and display the table which is located in Popup previous year, as I proceed? you can give me an example