相同公网 IP 的访客访问落地页，让其一直显示最初显示的微信号，不同公网 IP 则指定概率随机切换微信号

<!-- 用法示例一：同一IP显示让其一直显示同一个微信号，不同ip 则指定概率随机切换微信号； -->
<script src="http://pv.sohu.com/cityjson?ie=utf-8"></script>
<script type="text/javascript">
  console.log(returnCitySN["cip"]+','+returnCitySN["cname"]);//JS获取公网IP和城市
</script>
<script>
var stxlwx = "";
var shopcatCookit=window.localStorage.getItem("sign_ip");

if(shopcatCookit != null && shopcatCookit == returnCitySN["cip"]){//同一ip时
    var stxlwx = window.localStorage.getItem("sign_wx");
    console.log("同一IP"+shopcatCookit+"对应微信号："+stxlwx);  
}else{//新ip或不同ip时
    //匹配概率
    var gailv = Math.floor((Math.random()*100));
    if( gailv > 50){ 
                 console.log("概率50%");
         var arr_wx =['11111111'];  //微信号   50%
         
    }else if(gailv > 20 && gailv <= 50){  
      console.log("概率30%");
       var arr_wx =['222222222'];  //微信号    30%
        
    }else if(gailv <= 20){  
      console.log("概率20%");
                var arr_wx =['333333333'];  //微信号   20%
       
    }
    var wx_index = Math.floor((Math.random()*arr_wx.length));
    var stxlwx = arr_wx[wx_index];
    console.log("随机微信号:"+stxlwx);   
    // 设置缓存
    window.localStorage.setItem("sign_ip",returnCitySN["cip"]);
    window.localStorage.setItem("sign_wx",stxlwx);
}
</script>

 

<!-- 用法示例二，数组里微信号越多则随机概率 越低 如1个微信号是100%，2个微信号是各50%，3个是各33%......以此类推。-->
<script src="http://pv.sohu.com/cityjson?ie=utf-8"></script>
<script type="text/javascript">
  console.log(returnCitySN["cip"]+','+returnCitySN["cname"]);
</script>
<script>
var stxlwx = "";
var shopcatCookit=window.localStorage.getItem("sign_ip");

if(shopcatCookit != null && shopcatCookit == returnCitySN["cip"]+20){//同一ip时
    var stxlwx = window.localStorage.getItem("sign_wx");
    console.log("同一IP"+shopcatCookit+"对应微信号："+stxlwx);    
}else{//新ip或不同ip时

     //2个微信号则50%，3个微信号则33%;4个微信号则25%........以此类推，微信号越多概率越低。
    var arr_wx =['11111111','2222222']; 
    
    var wx_index = Math.floor((Math.random()*arr_wx.length));
    var stxlwx = arr_wx[wx_index];
    console.log("随机微信号:"+stxlwx);    
    // 设置缓存
    window.localStorage.setItem("sign_ip",returnCitySN["cip"]);
    window.localStorage.setItem("sign_wx",stxlwx);
}
</script>