griview点击后变色

  <script type="text/javascript">      

  var prevselitem = null;       

function selectx(row) {                        

//           if (prevselitem != null) {

//               prevselitem.style.backgroundColor = '#ffffff'; //           }          

   row.style.backgroundColor = 'PeachPuff';           

  prevselitem = row;

       }      </script>

 <asp:GridView ID="gv" runat="server" AutoGenerateColumns="False" Width="100%"
                CssClass="grid" OnRowDataBound="gv_RowDataBound">

protected void gv_RowDataBound(object sender, GridViewRowEventArgs e)    

{        

       //首先判断是否是数据行      if (e.Row.RowType == DataControlRowType.DataRow)      

      {             e.Row.Attributes.Add("onclick", e.Row.ClientID.ToString() + ".checked=true;selectx(this)");//点击行变色       

                //  e.Row.Attributes.Add("onmouseover", "if(this!=prevselitem){this.style.backgroundColor='#Efefef'}");//当鼠标停留时更改背景色          

                //  e.Row.Attributes.Add("onmouseout", "if(this!=prevselitem){this.style.backgroundColor='#ffffff'}");//当鼠标移开时还原背景色

        }

    }