Get token back in unity

Hi Guys

I am working on instagram for web player. for getting token i hit the api in unity and open a popup window use by Application.ExternalCall("OpenPopUp"); code is

 function OpenPopUp()
 {
     var F = 0;
     if (screen.height > 500) 
     {
         F = Math.round((screen.height / 2) - (250))
     }
     window.open ("https://instagram.com/oauth/authorize/?client_id=%clientID%&redirect_uri=http://localhost/~nitin/12julyInstgram/build/instagram_new.html&response_type=token","Instagram","menubar=1,resizable=1,width=500,height=500,scrollbars=1,left="+Math.round((screen.width/2)-250)+",top="+F);
 }

this is working fine a popup window open and token is there below is screenshot][1]

There is a html file in my build folder so there is 3 file now in my build folder build.html,build.unity3d and redirect html)and i give that html path as redirect url in instagram and in my api .

the problem is i want to get that token in unity back.i tried but not get any success i tryed below link method also

http://docs.unity3d.com/Documentation/Manual/UnityWebPlayerandbrowsercommunication.html

i get that token in a var in my html file code is

access_token = window.location.hash.split('&')[0].replace('#access_token=', '');

alert(access_token); this alert is working fine I don't Know I am Doing right or not ,so Suggest me best way to get that token in unity back.I am in big trouble and sorry for my english Thanks in advance