show text field only when radio button is clicked, plz suggest the javascript and where to embed it on jira 4.4

[navneet nischal]

<script type="text/javascript">
field = document.getElementById('customfield_10106');
if (field)
{
target = document.getElementById('customfield_10107');
target.style.display='none';

if (field.value != 'yes') target.style.display='none';

field.onchange=function()
{
if (this.value == 'yes')

{ target.style.display = ''; }
else

{ target.style.display='none'; }
}
}
</script>

i guess there is the mistake because it does not work. plz specify for where do i write the code in jira so as it works

[Dieter]

If you do not put this code in document ready handler the getElementById might return null since the DOM tree is not built yet completely when you just add the code to a custom field description. Please put your code in a ready handler like in this answer: https://answers.atlassian.com/questions/33517/hide-tabs-like-issue-types-etc-from-project-role-administrators?page=1 Let us know how it goes. I'd also suggest to invest time in learning jQuery. As you can see from the above link this helps create short, yet readable solutions