How do i show an error message using JScript

[drewgeezmoe]

I tried using this code, but the error message does not show

    Protected Sub ImageButton1_Click(ByVal sender As Object, ByVal e As System.Web.UI.ImageClickEventArgs) Handles ImageButton1.Click
        Dim StrScript As String
        Dim mm As String = drpMonth.SelectedItem.Text '--my value here is 9
        Dim dd As String = drpDay.SelectedItem.Text '--my value here is 1
        Dim yy As String = drpYear.SelectedItem.Text '--my value here is 2007
        Dim Bday As Date = mm & " / " & dd & " / " & yy & " " & "12:00:00"
        Dim timedifference As Long

        timedifference = DateDiff(DateInterval.Second, Bday, Now)


        If timedifference < 0 Then
            StrScript = "<script language='javascript'>"
            StrScript &= vbCrLf & "alert('The birthday you entered is greater than the current date');"
            StrScript &= vbCrLf & "</script>"

        End If

End Sub

Thank you for the help

 

[BOA_Dev]

You arent ever using the strScript string?
stick this at the end:

Response.Write(strScript)