var _client = 'old';
var browser=navigator.appName;
var ver=parseInt(navigator.appVersion);
if (ver >= 3) _client="ok";
if (browser == "Microsoft Internet Explorer") _client='ie';
function popup (url, wname, w, h, rez) {
        urllength = url.length;
        winame = wname;
        title = winame
        winparams = 'toolbar=0,location=0,directories=0,status=' + rez + ',menubar=0,resizable=' + rez + ',scrollbars=' + rez + ',width=' + w + ',height=' + h ;
        if (_client == "ok") {
                winame = open(url, winame, winparams);
                history.go(url);
                document.close()
                winame.focus();
        }
        if (_client == "ie") {
                baseurl = location.href;
                winame = open(url,winame,winparams);
                document.close();
                if  (ver > 3) winame.focus();
        }
        if (_client == "old") {
                baseurl = location.href;
                winame = open(url,winame,winparams);
                document.close();
        }       
}