Javascript in workflow's approval node form

Hi All,

I tried using javascript into workflow's approbal node form to get a condition with an workflow variable like this:

<scripts language="javacript">

   if("${jobUserData_PUBLICDATA_theVariableName}=="CDD")

   {

         Instructions;

   }

</script>

It don't work...

so my question is:

is it possible to use the worflow variables into javascript approbal node form?

Thank by advance.