Gridview operations in asp.net

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C#

ASP.NET

I want to have keyevent and mouseevent to select a rows on a gridview control which is placed inside a updatepanel(update in every 1 seconds). I am able to have the mouse event not able to perform keyevent on the gridview. please help.
Here is the code that I am using

//C# code

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            e.Row.Attributes["onmouseover"] = 
                "javascript:setMouseOverColor(this);";
            e.Row.Attributes["onmouseout"] = 
                "javascript:setMouseOutColor(this);";
            e.Row.Attributes["onclick"] = 
            ClientScript.GetPostBackClientHyperlink
                (this.GridView1, "Select$" + e.Row.RowIndex);


            
        }
    }

//JavaScript code

<script language="javascript" type="text/javascript">
       var oldgridSelectedColor;

       function setMouseOverColor(element)
       {
           oldgridSelectedColor = element.style.backgroundColor;
           element.style.backgroundColor='yellow';
           element.style.cursor='hand';
           element.style.textDecoration='underline';
       }

       function setMouseOutColor(element)
       {
           element.style.backgroundColor=oldgridSelectedColor;
           element.style.textDecoration='none';
       }
   </script>