Show One Array Item Until It's Time For Next?

here I have array :

Code:

l[1.0]='A';
l[1.4]='B';
l[3.0]='C';

[code]...

And time :

Code:

var time = document.getElementById("time").innerHTML;

But making it

Code:

document.getElementById("k").innerHTML = l[time];

puts false into mine div, time changes alot and is in same format as array names.That function is repeated every 100 microseconds :

Code:

window.setTimeout(myFunction, 100);

Trying to do that in console tells me that doing it like : l[document.getElementById("time").innerHTML] gives me some value while using time variable just undefined, no matter it's same value Next problem I would want my text appear somehow like this when time is 3.0:

Quote:

ABCDFH

I can already guess that would be alot of code to make it interactive but any ideas, or leads where i should start, because that is my first time giving some more attention to JS.