how to use array in background script

In below script how can i use an array instead of single sys_id

var count = 0;
        var server = '9u99hvhft7800njhuy';
        var serverrel = new GlideRecord('cmdb_ci');
        serverrel.addEncodedQuery('parent.operational_status=1^child.sys_id=' + server);
        serverrel.query();
        while (serverrel.next()) {
            count++;
        }
        gs.log("count"+count);
        return JSON.stringify(count);