Populating a javascript array with datatable data

Question

I want to populate a javascript array with datatable data.
How do I do this?
I want the javascript array to be populated as the datatable is displayed.
Doing this way doesn't work.
<h:dataTable value="#{pmManager.profiles}" var="pmProfile" binding="#{pmManagerUiBean.uiTable}" ">
<script>
allProfilenames[index]='#{pmProfile.profileName}';
          alert("index ="+index);
          alert("...1"+allProfilenames[0]);
          alert("...2"+allProfileRes[0]);
          index++;
</script>
<h:dataTable>

Answer 1

In Javascript do something like this:
document.getElementById('form1:dec_param');
where form1:dec_param is the id of the component on the page source (html)