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function bk_read() {
                var phints = {};
                if (window.location.search) {
                    var params = window.location.search.split('?')[1].split('&');
                    for (var i = 0, n = params.length; i < n; i++) {
                        var param = params[i].split('=');
                        var key = param[0];
                        var val = decodeURIComponent(param[1]);
                        if ('phint' == key) {
                            val = val.split('=');
                            val[0] === '__bk_l' ? phints[val[0]] = val.splice(1).join('=') : phints[val[0]] = val[1]
                        }
                    }
                }
                return phints
            }