var dir = location.href.substring(0,location.href.lastIndexOf('/')+1);
var url = location.href.substring(dir.length,location.href.length+1);
if (document.images) {
  image1on = new Image();
  image1on.src = "blue/b1on.jpg";

  image2on = new Image();
  image2on.src = "blue/b2on.jpg";

  image3on = new Image();
  image3on.src = "blue/b3on.jpg";

  image4on = new Image();
  image4on.src = "blue/b4on.jpg";

  image5on = new Image();
  image5on.src = "blue/b5on.jpg";

  image6on = new Image();
  image6on.src = "blue/b6on.jpg";
 
  image7on = new Image();
  image7on.src = "blue/b7on.jpg";


 
  image1off = new Image();
  image1off.src = "blue/b1.jpg";

  image2off = new Image();
  image2off.src = "blue/b2.jpg";

  image3off = new Image();
  image3off.src = "blue/b3.jpg";

  image4off = new Image();
  image4off.src = "blue/b4.jpg";

  image5off = new Image();
  image5off.src = "blue/b5.jpg";

  image6off = new Image();
  image6off.src = "blue/b6.jpg";

  image7off = new Image();
  image7off.src = "blue/b7.jpg"



}
function checkpossi() 
{   if (document.images) 
{  if ( url=="home.htm")
{image1on.src = "blue/b1ac.jpg"; image1off.src = "blue/b1ac.jpg"; image1.src = image1off.src}
}
{  if ( url=="photos.htm")
{image2on.src = "blue/b2ac.jpg"; image2off.src = "blue/b2ac.jpg"; image2.src = image2off.src}
}
{  if ( url=="tripreports.htm")
{image3on.src = "blue/b3ac.jpg"; image3off.src = "blue/b3ac.jpg"; image3.src = image3off.src}
}
{  if ( url=="links.htm")
{image4on.src = "blue/b4ac.jpg"; image4off.src = "blue/b4ac.jpg"; image4.src = image4off.src}
}

{  if ( url=="about.htm")
{image5on.src = "blue/b5ac.jpg"; image5off.src = "blue/b5ac.jpg"; image5.src = image5off.src}
}

{  if ( url=="search.htm")
{image7on.src = "blue/b7ac.jpg"; image7off.src = "blue/b7ac.jpg"; image7.src = image7off.src}
}




}

function changeImages() {
  if (document.images) {
    for (var i=0; i<changeImages.arguments.length; i+=2) {
      document[changeImages.arguments[i]].src = eval(changeImages.arguments[i+1] + ".src");
    }
  }
}