js 调用微信浏览器内置方法，启动支付

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$.post("{php echo app_url('pay/cash')}",{orderno:orderno,paytype:paytype},function(m){ //todo: 跳转到微信支付，获取支付的相关信息                            if(!m.errno){                                m.data.timeStamp = String(m.data.timeStamp);                                WeixinJSBridge.invoke('getBrandWCPayRequest', {                                    'appId': m.data.appid ? m.data.appid : m.data.appId,                                    'timeStamp': m.data.timeStamp,                                    'nonceStr': m.data.nonceStr,                                    'package': m.data.package,                                    'signType': m.data.signType,                                    'paySign': m.data.paySign,                                }, function(res) {                                    if(res.err_msg == 'get_brand_wcpay_request:ok') {                                        location.href = "{php echo app_url('pay/cash')}&orderno="+orderno+"&paytype="+paytype+"&done=1";                                    } else {                                        $.post("{php echo app_url('pay/paytype')}",{orderno:orderno,remark:remark,othername:othername,op:"ajax",checkpay:"8"},function(m){                                            $.toast("已取消支付");                                        },"json");                                    }                                });                            }else{                                $.confirm(m.message, function () {                                    history.go(-1);                                })                            }                        },"json");

　　

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document.addEventListener('WeixinJSBridgeReady', function onBridgeReady() {        WeixinJSBridge.invoke('getBrandWCPayRequest',pathinfo , function(res) { // Pathinfo:json，相关的信息            if(res.err_msg == 'get_brand_wcpay_request:ok') {                location.href='/index.php/Mobile/User/order_detail/id/'+orderid+'.html'            } else {                location.href='{$url}'            }        });    }, false);