textchanged event  for page controls
                            
                         
                        
                     
                 
                
                    
hi...
i placed 10 text box, 10 dropdown list  and one update button in page form.
in page load i disable update button,whenever i textchnage for any above control that time 
my update button will enable.
give me any sample code and ideas to solve this one..
i dont want to write code for every control textchnge event...
plz..help me