dynamic table ID change

Hi All, I have a problem with an id of a dynamic generated control. I create following table:
Table table = new Table();
table.ID = "select_table";
Unit unit100perc = Unit.Percentage(100);
table.Width = unit100perc;
table.CellPadding = 0; table.CellSpacing = 0;
PhSelectTable.Controls.Add(table);
 
When I look into my source, the id is not "select_table" but "ctl00_cph1_select_table" How can I keep my own ID, this is important for written css. Kind Regards
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