Get user collection from web using SPServices for SharePoint

<script type="text/javascript" src="/SRC/SRCjQuery/jquery-1.4.2.min.js"></script>
<script language="javascript" type="text/javascript" src="/SRC/SRCjQuery/jquery.SPServices-0.5.4.min.js"></script>
<script type="text/javascript">
/* place code right before the matching closing tag </asp:Content> for <asp:Content ContentPlaceHolderId="PlaceHolderMain" runat="server">*/
  $(document).ready(function() {
    $().SPServices({
      operation: "GetGroupCollectionFromUser",
      userLoginName: $().SPServices.SPGetCurrentUser(),
      async: false,
      completefunc: function(xData, Status) {
        if($(xData.responseXML).find("Group[Name='GroupName']").length == 1) {
          $("#zz9_ID_PersonalizePage").remove();
          /*   zz5_ID_LoginAsDifferentUser
               zz6_ID_RequestAccess
               zz7_ID_Logout
               zz8_MSOMenu_ChangePassword
               zz9_ID_PersonalizePage   */
        }
      }
   }); /*close().SPServices({ */
}); /* close (document).ready(function() { */
</script>

GetAllUserCollectionFromWeb
$().SPServices({
    operation: "GetAllUserCollectionFromWeb",
    webUrl: "http://url/s",
    completefunc: function (xData, Status) {
    $(xData.responseXML).find("User").each(function() {
       var perms =$(this).attr("RoleName");
        var liHtml = "<li>" + $(this).attr("ows_Title") + "</li>";
       i=1;
       if(i==1)
       {
      alert(liHtml );
     
      }
      i=i +1;
});
     }
});