How do I...retrive data from database on tooltip on gridview using jquery

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VB

ASP.NET

Protected Sub GridView1_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles GridView1.RowDataBound

Dim strToolTip As String = ""
       If e.Row.RowType = DataControlRowType.DataRow Then

           Dim s1 As String

           Dim drno As String = e.Row.Cells(3).Text

           s1 = "SELECT Remarks FROM DR_Status where drno = " & drno

           dt = dp.data_table(s1)

           For i As Integer = 0 To dt.Rows.Count - 1
               strToolTip = dt.Rows(i)("Remarks").ToString()

           Next
           e.Row.ToolTip = strToolTip
       End If

   End Sub

this is my code which is working properly.
But i want to do the same thing by using JQuery.
plz help me. m not getting how to do that