// Copyright 2006, Spectrum Research, Inc.
// All Rights Reserved.
// Written by Alfred J. Heyman

var objPrevSelectedOut      = "";
var objPrevSelectedOver     = "";
var objPrevSelectedSelected = "";
                        
function Tab_Over(over, out, selected)
{ if(over != objPrevSelectedOver)
  { obj = document.getElementById(selected);
    obj.style.visibility = "hidden";

    obj = document.getElementById(out);    
    obj.style.visibility = "hidden";

    obj = document.getElementById(over);   
    obj.style.visibility = "";
  };
}

function Tab_Out(over, out, selected)
{ if(over != objPrevSelectedOver)
  { obj = document.getElementById(out);   
    obj.style.visibility = "";

    obj = document.getElementById(over);  
    obj.style.visibility = "hidden";

    obj = document.getElementById(selected);
    obj.style.visibility = "hidden";
  };
}

function Tab_Selected(over, out, selected)
{ // Reset any previously selected button.
  if(objPrevSelectedSelected)
  { obj = document.getElementById(objPrevSelectedOut);
    obj.style.visibility = "";

    obj = document.getElementById(objPrevSelectedOver);
    obj.style.visibility = "hidden";

    obj = document.getElementById(objPrevSelectedSelected);
    obj.style.visibility = "hidden";
  };

  // Save this selection.
  objPrevSelectedSelected = selected;
  objPrevSelectedOver     = over;
  objPrevSelectedOut      = out;

  obj = document.getElementById(out);       
  obj.style.visibility = "hidden";

  obj = document.getElementById(over);      
  obj.style.visibility = "hidden";

  obj = document.getElementById(selected);  
  obj.style.visibility = "";    
  return(false);
};