addEventListener on getElementsByClassName

Don't know why this doesn't work?

window.onload  = function (){
    var inner = document.getElementsByClassName('inner');
    inner[0].addEventListener("scroll", runthis);
}

Receive an error on console:

Cannot read property 'addEventListener' of undefined

The class exists and there's only one of them. So I'm only targeting the first and only element.
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Rainer JeschorCommented:
Hi,
what does this show:
window.onload  = function (){
     var inner = document.getElementsByClassName('inner');
     alert(inner.length);
 }

Open in new window

intoxicated_curveballAuthor Commented:
Says "1"

Also I tried my code locally and it works, so perhaps it has something to do with the "inner" div being loaded dynamically??
intoxicated_curveballAuthor Commented:
This is weird. On the page in question, the HTML is located directly in the <script> tag... what does this mean?

<script type="text/template">

                        <div class="inner">
                              <table class="items">
                                    <tbody></tbody>
                              </table>
                        </div>
</script>
Rainer JeschorCommented:
Hi,
this is normally used to create "pure" JavaScript templating (not using any custom JS framework like AngularJS or knockout).
See:
http://en.wikipedia.org/wiki/JavaScript_templating

But without any references this does not really make sense.

HTH
Rainer

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