function webvart(name) {
var url = document.URL;
var wvurlmatch = document.cookie.match('(^|;) ?wvurl=([^;]*)(;|$)');
if (wvurlmatch) { if (unescape(wvurlmatch[2]) != url) return false; }
document.cookie = "wvurl=" + escape(url) + "; path=/; expires=Sunday, 17-Jan-2038 19:14:07 GMT; domain=.nch.com.au;"
var naon = name + ".On";
var noff = name + ".Off";
var wv = '';
var match = document.cookie.match('(^|;) ?webvar=([^;]*)(;|$)');
if (match) {
wv = unescape(match[2]);
if (wv.indexOf(naon) != -1) return true;
if (wv.indexOf(noff) != -1) return false;
wv = wv + ",";	
}
var result = Math.floor(Math.random() * 10000.0) < 5000;
if (result) wv = wv + naon;       
else wv = wv + noff;       
document.cookie = "webvar=" + escape(wv) + "; path=/; expires=Sunday, 17-Jan-2038 19:14:07 GMT; domain=.nch.com.au;"
return result;
}