http://stackoverflow.com/questions/4843472/javascript-listener-keypress-doesnt-detect-backspace chrome에서는 keypress()가 delete detect하지 못함.web browser 마다 keypress의 detect 범위가 다름 Single keyclick events triggeredon Chromekeydown/keypress/keyup when browser registers a keyboard input (keypress is fired)keydown/keyup if no keyboard input (tested with alt, shift, backspace, arrow keys)keydown only for ..