function pageReturn(){
history.go(-2);
}



if (document.images) {
  image1on = new Image();
  image1on.src = "world_nav_images/swap1.jpg";
  image1off = new Image();
  image1off.src = "world_nav_images/swap1_on.jpg";

  image2on = new Image();
  image2on.src = "world_nav_images/swap2.jpg";
  image2off = new Image();
  image2off.src = "world_nav_images/swap2_on.jpg";

  image3on = new Image();
  image3on.src = "world_nav_images/swap3.jpg";
  image3off = new Image();
  image3off.src = "world_nav_images/swap3_on.jpg";

  image4on = new Image();
  image4on.src = "world_nav_images/swap4.jpg";
  image4off = new Image();
  image4off.src = "world_nav_images/swap4_on.jpg";

  image5on = new Image();
  image5on.src = "world_nav_images/swap5.jpg";
  image5off = new Image();
  image5off.src = "world_nav_images/swap5_on.jpg";

  image6on = new Image();
  image6on.src = "world_nav_images/swap6.jpg";
  image6off = new Image();
  image6off.src = "world_nav_images/swap6_on.jpg";

  image7on = new Image();
  image7on.src = "world_nav_images/swap7.jpg";
  image7off = new Image();
  image7off.src = "world_nav_images/swap7_on.jpg";
  
  image8on = new Image();
  image8on.src = "world_nav_images/swap8.jpg";
  image8off = new Image();
  image8off.src = "world_nav_images/swap8_on.jpg";
}

 
function turnOn(imageName) {
  if (document.images) {
    document[imageName].src =
      eval(imageName + 'on.src');
  }
}

function turnOff(imageName) {
  if (document.images) {
    document[imageName].src =
      eval(imageName + 'off.src');
  }
}
 
function smWin() {
smallWindow = window.open('http://www.tandf.co.uk/books/ordering.html', 'smallWin', "status=0,menubar=0,resizable=0,toolbar=0,location=0,scrollbars=1,width=500,height=400,left=0,top=0");
smallWindow.focus()
}

function lgWin(all) {
largeWindow = window.open(all, 'largeWin', "status=1,menubar=1,resizable=1,toolbar=1,location=1,scrollbars=1,width=760,height=400,left=0,top=0");
largeWindow.focus()
}