function doPostBackNewWindow(obj) {
    var postback = obj.href.split("'");
    var target = postback[1];
    var argument = postback[3];
    var url = document.forms[0].action;
    if (url.indexOf('?') == -1) url += '?'; else url += '&';
    url += '__EVENTTARGET=' + target + '&__EVENTARGUMENT=' + argument;

    window.open(url,'NewWindow');
}