On a webpage the following code is incurred:

<script language="JavaScript">

and then it has all these things that appear to be maybe variables:

var_pn="page URL" //page name
var_ml="another URL" //multilevel content category

But it is the following code that I need to know about:

var_seg=""; //visitor segmentation
var_fnl=""; //Funnels
var_fv=""; //Form validation function name
var_cmpn=""; //Campaign analysis - query name for ID
var_cmp=""; //Campaign analysis - id
var_gp=""; //Campaign analysis - goal page
var_gpn=""; //Campaign analysis - query name for goal page
var_pec=""; //Error codes
</script>

What does the structure of the above variables mean? What does ""; mean? How are these used?