when i entered house no in first textbox ..display textbox2.

Question

plz write quarie.......
i have two fields .......

house no  & area




1-1-1  to 1-1- EOB   = areaname1.


1-2-1  to  1-2-78   = areaname2 .
1-3-50 to 1-3-70 = areaname3.






i wan code like this...


i have two textboxs......
when i entered house no in first text box  display area name in second textbox....




ex-  when i entered  house no:    textbox1   1-1-30    textbox2  shows  as areaname1
                                                                       1-2-1     textbox2  shows as areaname2