function SPAW_base_image_name(ctrl)
  {
    var imgname = ctrl.src.substring(0,ctrl.src.lastIndexOf("/"))+"/tb_"+ctrl.id.substr(ctrl.id.lastIndexOf("_tb_")+4, ctrl.id.length);
    return imgname;
  }
function SPAW_classic_bt_over(ctrl)
{
  ctrl.className = "SPAW_classic_tb_over";
}
function SPAW_classic_bt_out(ctrl)
{
  var imgfile = SPAW_base_image_name(ctrl)+".gif";

  if (ctrl.getAttribute("spaw_state") == true)
  {
    ctrl.className = "SPAW_classic_tb_down";
  }
  else
  {
    ctrl.className = "SPAW_classic_tb_out";
  }

  ctrl.src = imgfile;
  ctrl.disabled = false;
}
function SPAW_classic_bt_down(ctrl)
{
  ctrl.className = "SPAW_classic_tb_down";
}
function SPAW_classic_bt_up(ctrl)
{
  ctrl.className = "SPAW_classic_tb_out";

}
function SPAW_classic_bt_off(ctrl)
{
  var imgfile = SPAW_base_image_name(ctrl)+"_off.gif";


  ctrl.src = imgfile;
  ctrl.disabled = true;
}