微信公众号支付代码 js

function onBridgeReady(){
   WeixinJSBridge.invoke(
      'getBrandWCPayRequest', {
         "appId":"wx2421b1c4370ec43b",     //公众号名称，由商户传入     
         "timeStamp":"1395712654",         //时间戳，自1970年以来的秒数     
         "nonceStr":"5K8264ILTKCH16CQ2502SI8ZNMTM67VS", //随机串     
         "package":"prepay_id=u802345jgfjsdfgsdg888",     
         "signType":"MD5",         //微信签名方式：     
         "paySign":"70EA570631E4BB79628FBCA90534C63FF7FADD89" //微信签名 
      },
      function(res){
         if(res.err_msg == "get_brand_wcpay_request:ok" ) {
            // 支付成功后的操作
         }    
      }); 
}
if (typeof WeixinJSBridge == "undefined"){
   if( document.addEventListener ){
      document.addEventListener('WeixinJSBridgeReady', onBridgeReady, false);
   }else if (document.attachEvent){
      document.attachEvent('WeixinJSBridgeReady', onBridgeReady); 
      document.attachEvent('onWeixinJSBridgeReady', onBridgeReady);
   }
}else{
   onBridgeReady();
}