Search and highlight

Question

Hi all..
I've implemented search function using ajax in asp.net..where i used scriptmanager,textbox,realtimesearchmonitor,updatepanel,gridview and sqldatasource..
All works fine..but i want the search function highlight the text in the gridview as what i type in the textbox..
Any ideas?
any add on on the cs-file?
My cs file is like this :

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;

namespace Search
{
    public partial class _Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }
    }
}