assign datepicker to runtime textboxes

//dynamic table
Table examtime = new Table();
//examtime.ID = "examtime";
TableHeaderCell thc = new TableHeaderCell();
TableHeaderRow hr = new TableHeaderRow();
Label dat = new Label();
dat.Text = "Date";
thc.Controls.Add(dat);
hr.Cells.Add(thc);
examtime.Controls.Add(hr);
for (int b = 0; b< Convert.ToInt32(TextBox1.Text); b++)
{
  TableRow tr = new TableRow();
  for (int i = 0; i < 1; i++)
  {
    TableCell tc = new TableCell();
    //here is the date column i need to apply datepicker to each textbox
    TextBox txtdate = new TextBox();
    txtdate.ID = "dpicker" +b.ToString();
    txtdate.Width = 75;
    tc.Controls.Add(txtdate);
    tr.Cells.Add(tc);
  }
  examtime.Controls.Add(tr);
}
PlaceHolder1.Controls.Add(examtime);