/**
 * 获取客户端IP地址
 *
 * @param 
 * @arrange (512.笔记) jb51.cc
 **/
<script src="http://pv.sohu.com/cityjson?ie=utf-8"></script>
<script type="text/<A class="infotextkey" href="http://jb51.cc/" target=_blank>javascript</A>">
document.write(returnCitySN["cip"]+','+returnCitySN["cname"])
</script>

/**
 * 获取客户端IP地址
 *
 * @param 
 * @arrange (512.笔记) jb51.cc
 **/
<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>

/**
 * 获取客户端IP地址
 *
 * @param 
 * @arrange (512.笔记) jb51.cc
 **/
<script type="text/javascript" src="http://fw.qq.com/ipaddress" charset="gb2312"></script>
$(document).ready(function() {
$("#ip").val(IPData[0]);
$("#add").val(IPData[2]);
})