var tab_num = 0;

function tab_show (id, num)
{
  var col_inact_tab = "#E0EED3";
  var col_act_tab = "white";
  var col_inact_link = "#43AA2E";
  var col_act_link = "black";

  if (tab_num == 0 && num > 0) tab_num = num;

  if (document.getElementById)
  {
    for (i=1; i<tab_num+1; i++)
    {
      document.getElementById ("tab_" + i).style.display = "none";
      document.getElementById ("link_" + i).style.background = col_inact_tab;
      document.getElementById ("link_" + i).style.color = col_inact_link;
    }
    document.getElementById ("tab_" + id).style.display = "block";
    document.getElementById ("link_" + id).style.background = col_act_tab;
    document.getElementById ("link_" + id).style.color = col_act_link;
  }
}

function popup (url, name, width, height)
{
  wnd = window.open (url, name, 'toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=1,resizable=1,width='+width+',height='+height+',top=0');
  wnd.focus ();
}