};

    var failure = function(o){

            alert("deleteNotification failure");

        };

    var postData = {'_method': 'delete'};

    var sUrl = url.replace('__NOTIFICATION_ID__',notification_id);

    ajaxPOST(sUrl, postData, success, failure);

};

var readNotification = function(url, notification_id, callbacks){

    var success = function(o){

            var $obj = $("#notification_"+notification_id);

            $obj.removeClass('unread');

            $obj.find('.read-notification').remove();

            _run_callbacks(callbacks);

        };

    var failure = function(o){

            alert("readNotification failure");

        };

    var postData = {'_method': 'put'};

    var sUrl = url.replace('__NOTIFICATION_ID__',notification_id);

    ajaxPOST(sUrl, postData, success, failure);

};

/**

 * Autocomplete functionality

 */

// Custom search function for the DataSource of users

var autocompleteMatchUsers = function (sQuery, myUsers) {

    // Case insensitive matching

    var query = sQuery.toLowerCase();

    var i = 0;

    var l = myUsers.length;

    var matches = [];

    // Match against each name of each contact

    for (; i < l; i++) {

        var contact = myUsers[i];

        if (((contact.fname+"").toLowerCase().indexOf(query) > -1) ||

             ((contact.lname+"").toLowerCase().indexOf(query) > -1) ||

             ((contact.nname) && ((contact.nname).toLowerCase().indexOf(query) > -1))) {

            matches[matches.length] = contact;

        }

    }

    return matches;

};

            // Case insensitive matching

            var query = sQuery.toLowerCase();

            var i = 0;

            var l = myGroups.length;

            var matches = [];

            for (; i < l; i++) {

                var matched_group = myGroups[i];

                if (matched_group.grname.toLowerCase().indexOf(query) > -1) {

                    matches[matches.length] = matched_group;

                }

            }

            return matches;

        };

    var matchAll = function (sQuery) {

            var u = matchUsers(sQuery);

            var g = matchGroups(sQuery);

            return u.concat(g);

        };

    // DataScheme for members

    var memberDS = new YAHOO.util.FunctionDataSource(matchAll);

    memberDS.responseSchema = {

        fields: ["id", "fname", "lname", "nname", "grname", "grmembers", "gravatar_lnk", "gravatar_size"]

    };

    // DataScheme for owner

    var ownerDS = new YAHOO.util.FunctionDataSource(matchUsers);

    ownerDS.responseSchema = {

        fields: ["id", "fname", "lname", "nname", "gravatar_lnk", "gravatar_size"]

    };

    // Instantiate AutoComplete for perms

    var membersAC = new YAHOO.widget.AutoComplete(divid, cont, memberDS);

    membersAC.useShadow = false;

    membersAC.resultTypeList = false;

    membersAC.animVert = false;

    membersAC.animHoriz = false;

    membersAC.animSpeed = 0.1;

    // Instantiate AutoComplete for owner

    var ownerAC = new YAHOO.widget.AutoComplete("user", "owner_container", ownerDS);

    ownerAC.useShadow = false;

    ownerAC.resultTypeList = false;

    ownerAC.animVert = false;

    ownerAC.animHoriz = false;

    ownerAC.animSpeed = 0.1;

    // Helper highlight function for the formatter

    var highlightMatch = function (full, snippet, matchindex) {

            return full.substring(0, matchindex)

            + "<span class='match'>"

            + full.substr(matchindex, snippet.length)

            + "</span>" + full.substring(matchindex + snippet.length);

        };

    // Custom formatter to highlight the matching letters

    var custom_formatter = function (oResultData, sQuery, sResultMatch) {

            var query = sQuery.toLowerCase();

            var _gravatar = function(res, em, size, group){

                var elem = '<img alt="gravatar" class="perm-gravatar-ac" style="width: {0}px; height: {0}px" src="{1}"/>'.format(size, em);

                if (!em) {