var fflog = function(logit) {
	enableDebug = true;
	enableAlert = true;
	if(!enableDebug) {
		return false
	}
	if (console) {
		console.log(logit);
	} else {
		if (enableAlert) {
			alert(logit)
		}
	}
}

function getlastkeycode(e) {

	var code;
	
	if(e && e.which){
		code = e.which
	} else if (e.event) {
		code = e.event.keyCode
	}
	
	e.lastpressdkey = code;

	var character = String.fromCharCode(code);
	fflog('Character was ' + character+' (keycode '+code+')');
		
}

//into a function called on onload of body I have this,
//document.forms[novo_ju].elements[novo_iu] = input elements
document.forms[novo_ju].elements[novo_iu].onkeypress = function() {
    return getlastkeycode(this)
}

/* Logged in console of firebug:

Character was � (keycode undefined)

But logged only at load of page, after any pass to function.