Test for a popunder working in ff 3-14, chrome 10-21, ie6-9

## popunder.html
<!DOCTYPE html>
<html>
<head>
<meta content="Hans-Peter Buniat" name="author">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Form-Submit Popunder</title>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
</head>
<body>
    <form id="testSubmit" action="http://www.google.com">
        <input type="submit" />
    </form>

    <script type="text/javascript">
    /* use jQuery as container for more convenience */
    (function($) {
        /**
         * Create a popunder
         *
         * @param  sUrl Url to open as popunder
         *
         * @return jQuery
         */
        $.popunder = function(sUrl) {
            var bSimple = $.browser.msie,
                run = function() {
                    $.popunderHelper.open(sUrl, bSimple);
                };
            (bSimple) ? run() : window.setTimeout(run, 1);
            return $;
        };

        /* several helper functions */
        $.popunderHelper = {
            /**
             * Helper to create a (optionally) random value with prefix
             *
             * @param  string name
             * @param  boolean rand
             *
             * @return string
             */
            rand: function(name, rand) {
                var p = (name) ? name : 'pu_';
                return p + (rand === false ? '' : Math.floor(89999999*Math.random()+10000000));
            },

            /**
             * Open the popunder
             *
             * @param  string sUrl The URL to open
             * @param  boolean bSimple Use the simple popunder
             *
             * @return boolean
             */
            open: function(sUrl, bSimple) {
                var _parent = self,
                    sToolbar = (!$.browser.webkit && (!$.browser.mozilla || parseInt($.browser.version, 10) < 12)) ? 'yes' : 'no',
                    sOptions,
                    popunder;

                if (top != self) {
                    try {
                        if (top.document.location.toString()) {
                            _parent = top;
                        }
                    }
                    catch(err) { }
                }

                /* popunder options */
                sOptions = 'toolbar=' + sToolbar + ',scrollbars=yes,location=yes,statusbar=yes,menubar=no,resizable=1,width=' + (screen.availWidth - 10).toString();
                sOptions += ',height=' + (screen.availHeight - 122).toString() + ',screenX=0,screenY=0,left=0,top=0';

                /* create pop-up from parent context */
                popunder = _parent.window.open(sUrl, $.popunderHelper.rand(), sOptions);
                if (popunder) {
                    popunder.blur();
                    if (bSimple) {
                        /* classic popunder, used for ie*/
                        window.focus();
                        try { opener.window.focus(); }
                        catch (err) { }
                    }
                    else {
                        /* popunder for e.g. ff4+, chrome */
                        popunder.init = function(e) {
                            with (e) {
                                (function() {
                                    if (typeof window.mozPaintCount != 'undefined' || typeof navigator.webkitGetUserMedia === "function") {
                                        var x = window.open('about:blank');
                                        x.close();
                                    }

                                    try { opener.window.focus(); }
                                    catch (err) { }
                                })();
                            }
                        };
                        popunder.params = {
                            url: sUrl
                        };
                        popunder.init(popunder);
                    }
                }

                return true;
            }
        };
    })(jQuery);

    $('#testSubmit').submit(function() {
        jQuery.popunder('http://www.fluege.de').popunder('http://www.flug24.de');
    });
    </script>
</body>
</html>