How to identify if user is in a particular permission group using Web Service

Some days back I was faced with a task of changing the behavior of the list new /Edit form based on the user presence in a particular permission group.

Problem Statement: If the user was present in “Members” group I need to hide some fields and if he was present in the “Owners” Group, I need to show all those fields.

Solution: By calling the GetGroupCollectionFromUser operation of the Users and Groups Web Service, you can determine whether your user is in the group. I got this from Marc post.

The only small issue fixed in that post code was that it worked not on every browser, hence I need to modify it a little to support cross browser. I used responseText instead of responseXML.

1. First we need to add JavaScript directives to the page, I have provided the CDN link which you can directly use or can download the libraries to use it.
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<!-- Reference jQuery on the Google CDN --> <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>   <!-- Reference SPServices on cdnjs (Cloudflare) --> <script type="text/javascript" src="http://cdnjs.cloudflare.com/ajax/libs/jquery.SPServices/0.7.1a/jquery.SPServices-0.7.1a.min.js"></script>

2. Then include the below script to check the current logged user’s group
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<script type="text/javascript"> $(document).ready(function() {  $().SPServices({   operation: "GetGroupCollectionFromUser",   userLoginName: $().SPServices.SPGetCurrentUser(),   async: false,   completefunc: function(xData, Status) {    if($(xData.responseText).find("CAB Owners").length >= 0)    {     //alert("Doing the stuff we want");    }   }  }); }); </script>



These scripts can be used on CEWP to achieve the desired result.