js获取Ip的几种方法

<script src="http://pv.sohu.com/cityjson?ie=utf-8"></script>
<script type="text/javascript">
document.write(returnCitySN["cip"]+','+returnCitySN["cname"])
</script>

<script language="javascript" type="text/javascript" src="http://fw.qq.com/ipaddress">
</script>
<script>document.write("你的IP是："+IPData[0]+"，来自："+IPData[2]);
</script>

<script type="text/javascript" src="http://fw.qq.com/ipaddress" charset="gb2312"></script>
$(document).ready(function() {

$("#ip").val(IPData[0]);
$("#add").val(IPData[2]);
})