ho_on = new Image ( );
ho_off = new Image ( );
ho_on.src = "Images/Home_on.gif";
ho_off.src = "Images/Home_off.gif";
ab_on = new Image ( );
ab_off = new Image ( );
ab_on.src = "Images/About_on.gif";
ab_off.src = "Images/About_off.gif";
sv_on = new Image ( );
sv_off = new Image ( );
sv_on.src = "Images/Services_on.gif";
sv_off.src = "Images/Services_off.gif";
rt_on = new Image ( );
rt_off = new Image ( );
rt_on.src = "Images/Rates_on.gif";
rt_off.src = "Images/Rates_off.gif";
ne_on = new Image ( );
ne_off = new Image ( );
ne_on.src = "Images/News_on.gif";
ne_off.src = "Images/News_off.gif";
pt_on = new Image ( );
pt_off = new Image ( );
pt_on.src = "Images/Partners_on.gif";
pt_off.src = "Images/Partners_off.gif";
co_on = new Image ( );
co_off = new Image ( );
co_on.src = "Images/Contact_on.gif";
co_off.src = "Images/Contact_off.gif";

function button_on ( imgId )
{
  if ( document.images )
  {
    butOn = eval ( imgId + "_on.src" );
    document.getElementById(imgId).src = butOn;
  }
}

function button_off ( imgId )
{
  if ( document.images )
  {
    butOff = eval ( imgId + "_off.src" );
    document.getElementById(imgId).src = butOff;
  }
}