protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
HtmlTable tb = (HtmlTable)e.Row.FindControl("tb1");
string tb_bg="background=\"img/pic_zwgk.jpg\"";
tb.Attributes.Add("onmouseover", tb_bg);
tb.Attributes.Add("onmouseout", "background=\"\"");
}
}