javascript - OnChange event not triggered -

i trying achieve convert uppercase while user type attaching following function on key up.

function changecharcase(evt,obj,upper)  {     if(obj.value != obj.value.touppercase())                  obj.value = obj.value.touppercase();     return true; } 

that seems working fine until attach on change event input text, , figured out , on change event not triggered @ on ie 11 , chrome . on firefox, seems okay.

you can check case here.

http://jsfiddle.net/zt8oqaw5/4/

you see , onchange event never triggered on first input text on browsers mentioned above.

does know why?

how can achieve character case conversion ? can't set css here because want value changed actually, not display.

personally use onkeyup or onblur instead of onchange text boxes. maybe can give try.