public ActionResult Groups(int id = 1)
{
Pager <Group> pager = new Pager <Group>();
string keyword = Request.QueryString["content"];
IOrderedQueryable <Group> groups = GroupView.GetGroupByKeywork(keyword);
ViewBag.page = id;
ViewBag.groups = pager.GetPage(groups, id);
ViewBag.pageNumber = pager.GetPageNumber(groups);
ViewBag.keyword = keyword;
return(View());
}