browser_name = navigator.appName;
browser_version = parseFloat(navigator.appVersion);

if (browser_name == 'Netscape' && browser_version >= 3.0)
{
  roll = 'true';
}
else
{
    if (browser_name == 'Microsoft Internet Explorer' && browser_version >= 3.0)
    {
      roll = 'true';
    }
    else
    {
      roll = 'false';
    }
}

function over(img,ref)
{
  if (roll == 'true')
  {
    document.images[img].src = ref;
  }
}

function out(img,ref)
{
  if (roll == 'true')
  {
     document.images[img].src = ref;
  }
}

if (roll == 'true')
{
  a1=new Image; a1.src='<?=IMG?>butt-1.gif';
  a2=new Image; a2.src='<?=IMG?>butt-2.gif';
  a3=new Image; a3.src='<?=IMG?>butt-3.gif';
  a4=new Image; a4.src='<?=IMG?>butt-4.gif';
  a5=new Image; a5.src='<?=IMG?>butt-5.gif';
  b1=new Image; b1.src='<?=IMG?>butt-1-1.gif';
  b2=new Image; b2.src='<?=IMG?>butt-2-1.gif';
  b3=new Image; b3.src='<?=IMG?>butt-3-1.gif';
  b4=new Image; b4.src='<?=IMG?>butt-4-1.gif';
  b5=new Image; b5.src='<?=IMG?>butt-5-1.gif';
}