1：

<script language="JavaScript">

function GetLocalIPAddr(){

     var oSetting = null;

     var ip = null;

     try{

         oSetting = new ActiveXObject( "rcbdyctl.Setting" );

         ip = oSetting.GetIPAddress;

         alert(ip);

         if (ip.length == 0){

             return "没有连接到Internet";

         }

         oSetting = null;

     }catch(e){

         return ip;

     }

     return ip;

}

alert(GetLocalIPAddr())

</script>

2：

<script>  

                     function   getIP(bat,txt){  

                     var   fso=new   ActiveXObject("Scripting.FileSystemObject")  

                     var   f=fso.createTextFile(bat,1);  

                     f.writeLine("ipconfig>"+txt);  

                     f.Close();  

                     var   wsh=new   ActiveXObject("wscript.shell");  

                     wsh.run(bat)  

                             setTimeout(display,1000)  

                     function   display(){  

                     var   f=fso.openTextFile(txt);    

                     alert(f.ReadAll());  

                     f.Close();  

                     fso.DeleteFile(bat);  

                     fso.DeleteFile(txt);  

                     }  

                   }  

                   getIP("qswhIP.bat","qswhIP.txt")  

                   </script>

3：

<object   classid=clsid:{248DD896-BB45-11CF-9ABC-0080C7E7B78D}  

                 name=winsock></object>  

             <script>try{alert(winsock.localIP)}catch(e){alert("没安装该控件")}  

             </script>

4:

function GetLocalIPAddress()

{

    var obj = null;

    var rslt = "";

    try

    {

        obj = new ActiveXObject("rcbdyctl.Setting");

        rslt = obj.GetIPAddress;

        obj = null;

    }

    catch(e)

    {

        //异常发生

    }

   

    return rslt;

}