获取当前外网IP地址
<script src="http://pv.sohu.com/cityjson?ie=utf-8"></script>
<script>
console.log(returnCitySN["cip"]+','+returnCitySN["cname"])
</script>
<script src="http://pv.sohu.com/cityjson?ie=utf-8"></script>
<script>
console.log(returnCitySN["cip"]+','+returnCitySN["cname"])
</script>