Help Regarding Ajax Autocomplete Extender control

Hi All,

I have created a small web application using ajax autocomplete extender. I have used VS2008 C# and oracle db. In oracle db I have 3 tables and in each table I have two records starting with the letter 'a'. I have achieved the autocomplete function; I mean when I typed letter a in the textbox it came up with popup showing the two values as both start with letter a. This is fine. But what I want is "Value Concatenation". I mean suppose first I type a it will show the popup from db table1 and I select the first value say 'Apple' now what I want is if I type space after I select the value, the pop up from table2 should appear and if I select the value say 'Ant' from the values taken from table2 it should be concatenated with the first value I selected. i.e; in text box I want "Apple Ant". It shouldn't replace the the first value that I had selected. The popup should allow to select the third item(from table3) and so on. How to achieve this ?

I searched in some forums, the solutions were little lengthy and not that much understandable.

Please help.

Thanks,
Sachi