protected void grdIssue_RowCreated(object sender, GridViewRowEventArgs e)
    {
        CheckBox chkHead = new CheckBox();
        if (e.Row.RowType.ToString().Trim() == "Header")
        {
            chkHead = (CheckBox)e.Row.FindControl("chkbxHeader");
            chkHead.Attributes.Add("onClick", "chkBocHeader(" + chkHead.ClientID + ",'H')");
        }
        else if (e.Row.RowType.ToString().Trim() == "DataRow")
        {
            CheckBox chkRow = new CheckBox();
            chkRow = (CheckBox)e.Row.FindControl("chkboxRow");
            chkRow.Attributes.Add("onClick", "chkBocHeader(this,'R')");
              }
    }