Custom DatePicker Control

[Memnoch1207]

I am creating a custom datepicker and everything is working fine except. I can't seem to access the textboxes clientID.

In my custom control I have a textbox and an image, which is a link.
I need to pass the textboxes ClientID with this link, but I can't seem to get it.

Here's my code

Protected Overrides Sub CreateChildControls()
        Controls.Clear()
 
        JHATextBox = New TextBox
        JHATable = New Table
        JHARow = New TableRow
        JHATextCell = New TableCell
        JHAEmptyCell = New TableCell
        JHAImageCell = New TableCell
 
        JHATextCell.Controls.Add(JHATextBox)
        [color=red]JHAImageCell.Text = "<a href=""javascript:LookupDate(Form1, " & Me.JHATextBox.ClientID & ", document.forms[0]." & Me.JHATextBox.ClientID & ".value)""><img alt=""Show Calendar"" src=""/Common/images/btn_calendar.gif"" border=""0"">"[/color]
        JHARow.Cells.Add(JHATextCell)
        JHARow.Cells.Add(JHAEmptyCell)
        JHARow.Cells.Add(JHAImageCell)
        JHATable.Rows.Add(JHARow)
 
        Controls.Add(JHATable)
    End Sub

I have tried JHATextBox.ClientID as well, but I still can't get the clientID of the textBox control.

Any ideas?