Untitled

Updating viewstate from postback response
var updatePreviewArea = function (nid) {
    var $content = jQuery('<div></div>');
    $content.load('http://site.com?nid=' + nid, function (response) {
        var $response = jQuery(response);

        jQuery('targetDiv1').replaceWith($response.find('#srcDiv1'));
        jQuery('targetDiv2').replaceWith($response.find('#srcDiv2'));

        // update viewstate from postback response
        var selectors = ['#__VIEWSTATE', '#__EVENTVALIDATION'];
        for (var i in selectors) {
            var value = $response.find(selectors[i]).val();
            jQuery(selectors[i]).val(value);
        }
    });
}