Javascript in 'Message Custom Field'

[[]D []-[] [] []_]

Hi there,

I'm trying to render an HTML-Tag with Javascript via 'Message Custom Field':

<script type="text/javascript">
infobox = document.createElement('div');
infobox.setAttribute('class','infoBox');
infobox.setAttribute('id','infofield');
infobox.style.margin = '0px 16px 16px';
node = document.createElement('span');
node.innerHTML = 'TEXT';
infobox.appendChild (node);
document.getElementById('stalker').appendChild(infobox);
</script>

The Infobox is displayed on the View-Issue-Screen as its supposed but the Problem occurs when a transition is triggered: The spinnging Loading-Icon appears and .... nothing happens, it spinns forever.

[RambanamP]

it means it is throwing some error, you can check this by using firebug on mozila or javascript console in crome