How to check the Data List / List view Selected items In Java Script

            string id = "";
            string id1 = "";
            for (int i = 0; i < dlBuddy.Items.Count; i++)
            {
                HtmlInputCheckBox chk = (HtmlInputCheckBox)dlBuddy.Items[i].FindControl("CheckBox1");
                if (chk.Checked == true)
                {
                    string chkid = chk.Value;
                    id = id + "," + chkid;
                }

            }