keycontrol.numeric-space-only

if ((e.shiftKey && e.keyCode != 9)              // shift, but not moving to previous field
    || (e.keyCode != 8                          // !backspace
    && e.keyCode != 9                           // !tab
    && e.keyCode != 32                          // !space
    && !(e.keyCode >= 37 && e.keyCode <= 40)    // !arrows
    && e.keyCode != 46                          // !delete
    && !(e.keyCode >= 48 && e.keyCode <= 57)    // !numbers
    && !(e.keyCode >= 96 && e.keyCode <= 105))  // !numberpad
) {
  e.preventDefault();
}