i have a search input filed. on key press in this, iam filtering the search results. if press backspace then also it refreshes the results.but the even is not firing if the backspace is pressed if the last character is removed from search string in which case i need to display all the results.

asdf
shows the results match asdf
press backspace
shows the results match asd
press backspace
shows the results match as
press backspace
shows the results match a
press backspace
should show all results
but in this case backspace event itself is not firing only in firefox.working well in IE.

Thanks