微信支付成功后返回聊天界面

<script type="text/javascript">
        //调用微信JS api 支付
        function jsApiCall()
        {
            WeixinJSBridge.invoke(
                'getBrandWCPayRequest',
                <?php echo $jsApiParameters; ?>,
                function(res){
                    var ua = navigator.userAgent.toLowerCase();
			if(ua.match(/MicroMessenger/i)=="micromessenger") {    
				WeixinJSBridge.call('closeWindow');    
			} else {    
				window.close();    
			}
                }
            );
        }
        function callpay()
        {
            if (typeof WeixinJSBridge == "undefined"){
                if( document.addEventListener ){
                    document.addEventListener('WeixinJSBridgeReady', jsApiCall, false);
                }else if (document.attachEvent){
                    document.attachEvent('WeixinJSBridgeReady', jsApiCall); 
                    document.attachEvent('onWeixinJSBridgeReady', jsApiCall);
                }
            }else{
                jsApiCall();
            }
        }
    </script>