Need Cookie Script fix

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I have a page with 20 potential cookies:

e.g.,

var TheCookieName = form.nameA
var TheCookieName = form.nameB

etc.

Any ideas on how I can modify this script so that it will call and display only the latest cookie?

function GetCookie (CookieName) {
var cname = CookieName + "=";
var i = 0;
while (i < document.cookie.length) {
var j = i + cname.length;
if (document.cookie.substring(i, j) == cname){
var leng = document.cookie.indexOf (&quot;;&quot;, j);
if (leng == -1) leng = document.cookie.length;
return unescape(document.cookie.substring(j, leng));
}
i = document.cookie.indexOf(&quot; &quot;, i) + 1;
if (i == 0) break;
}
return &quot;*&quot;;
}