Using event.which to verify if the user pressed the spacebar doesn't work in Firefox

Question

I want a script to verify if the key pressed is \'spacebar\', keycode 32. I noticed that IE uses other function names.

I tried a lot of solutions found here and this

Answer 1

EDIT

HMTL:

JS:

function predicao(objeto){
    var comprimento = objeto.value.length;
    var antipenultimo = comprimento - 4;
    var input = objeto.value.substring(antipenultimo,comprimento);
    var output = "";
    for(var i=0; i

I used here what Alexander Kahoun and pimvdb have posted.