retrieve form fields to populate via a jquery preview

Hi there,

I was wondering if there is a simple method to retrieve the form fields from the $form array. More to the point make the fields of a specific form(by id) available to a function so I can loop through a foreach and populate the field with a presubmitted preview of the form content.

basically

function previewform() {
       //grab the form fields
	global $form;
        //parse field entries from serialized form entries
	parse_str($_SERVER['QUERY_STRING']);
	foreach($entries as $entry) {
       //loop through getting label for each entry from $form and showing entry next to it from the querystring'.

       }
	die();
}

I know this is crude but I hope it helps get across what I'm trying to do.

Thanks in advance for the help guys!