Yes, see here: 
http://code.google.com/apis/gadgets/docs/legacy/remote-content.html#Params

On Jan 23, 2:11 pm, rob <[email protected]> wrote:
> I want to update the URL used each time _IG_FetchXmlContent fetches
> data to append the timestamp to the querystring. This can be achieved
> in prototype.js by doing something like the following:
>
> var url = 'http://www.example.com/rss.xml';
>
> ajax = new Ajax.Request(url, {
>         method:"get",
>         asynchronous:true,
>         frequency:60.0,
>         onSuccess:doSomething
>
> });
>
> var doSomething = function(response) {
>         //handle response here
>
>         //update url for next call
>         ajax.options.parameters = "timestamp=" + encodeURIComponent((new Date
> ()).getTime());
>
> }
>
> Is this possible with _IG_FetchXmlContent?
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