Subject Re: LOGICAL ERROR From Mervyn Bick <invalid@invalid.invalid> Date Mon, 12 Mar 2018 09:06:11 +0200 Newsgroups dbase.getting-started On 2018-03-11 10:09 PM, Mustansir Ghor wrote: > Dear Mervyn > >   'This' is form.eamont in this case.  The event handler is executed by >> form.eamont when the value changed.  As you use PBRCANCEL to save 0 to >> form.eamont the event handler will immediately disable PBRCANCEL and >> PBRSAVE. These pushbuttons are disabled until, say, the edit pushbutton >> is pressed which would execute code to enable them again. > > On testing,  the error is PBRCANCEL and PBRSAVE does not get disabled. I dont know why. EAMONT_onChange is executed if the user enters 0 and then uses TAB to move to the next control. If you use the pushbutton's onClick event handler to place 0 in EAMONT and move focus to the next control the onChange event isn't triggered. You will need to execute EAMONT_onChange yourself.             function PBRCANCEL_onClick()       form.eamount.value=0       form.cbregname.setfocus()       form.eamont_onChange()   return Mervyn.