function changeBgImg_home(){
if (document.all)
  document.all.desc.style.background='url(images/bgs/front.jpg)';
else if (document.getElementById)
  document.getElementById('desc').style.background='url(images/bgs/front.jpg)';
else if (document.layers)
  document.desc.background='url(images/bgs/front.jpg)';
}

function changeBgImg_godive(){
if (document.all)
  document.all.desc.style.background='url(images/bgs/godive.jpg)';
else if (document.getElementById)
  document.getElementById('desc').style.background='url(images/bgs/godive.jpg)';
else if (document.layers)
  document.desc.background='url(images/bgs/godive.jpg)';
}

function changeBgImg_rya(){
if (document.all)
  document.all.desc.style.background='url(images/bgs/rya.jpg)';
else if (document.getElementById)
  document.getElementById('desc').style.background='url(images/bgs/rya.jpg)';
else if (document.layers)
  document.desc.background='url(images/bgs/rya.jpg)';
}

function changeBgImg_divecourse(){
if (document.all)
  document.all.desc.style.background='url(images/bgs/divecourse.jpg)';
else if (document.getElementById)
  document.getElementById('desc').style.background='url(images/bgs/divecourse.jpg)';
else if (document.layers)
  document.desc.background='url(images/bgs/divecourse.jpg)';
}

function changeBgImg_tech(){
if (document.all)
  document.all.desc.style.background='url(images/bgs/train.jpg)';
else if (document.getElementById)
  document.getElementById('desc').style.background='url(images/bgs/train.jpg)';
else if (document.layers)
  document.desc.background='url(images/bgs/train.jpg)';
}

function changeBgImg_armed(){
if (document.all)
  document.all.desc.style.background='url(images/bgs/armed.jpg)';
else if (document.getElementById)
  document.getElementById('desc').style.background='url(images/bgs/armed.jpg)';
else if (document.layers)
  document.desc.background='url(images/bgs/armed.jpg)';
}





function changeBgImg_home_deep(){
if (document.all)
  document.all.desc.style.background='url(../images/bgs/front.jpg)';
else if (document.getElementById)
  document.getElementById('desc').style.background='url(../images/bgs/front.jpg)';
else if (document.layers)
  document.desc.background='url(../images/bgs/front.jpg)';
}

function changeBgImg_godive_deep(){
if (document.all)
  document.all.desc.style.background='url(../images/bgs/godive.jpg)';
else if (document.getElementById)
  document.getElementById('desc').style.background='url(../images/bgs/godive.jpg)';
else if (document.layers)
  document.desc.background='url(../images/bgs/godive.jpg)';
}

function changeBgImg_rya_deep(){
if (document.all)
  document.all.desc.style.background='url(../images/bgs/rya.jpg)';
else if (document.getElementById)
  document.getElementById('desc').style.background='url(../images/bgs/rya.jpg)';
else if (document.layers)
  document.desc.background='url(../images/bgs/rya.jpg)';
}

function changeBgImg_divecourse_deep(){
if (document.all)
  document.all.desc.style.background='url(../images/bgs/divecourse.jpg)';
else if (document.getElementById)
  document.getElementById('desc').style.background='url(../images/bgs/divecourse.jpg)';
else if (document.layers)
  document.desc.background='url(../images/bgs/divecourse.jpg)';
}

function changeBgImg_tech_deep(){
if (document.all)
  document.all.desc.style.background='url(../images/bgs/train.jpg)';
else if (document.getElementById)
  document.getElementById('desc').style.background='url(../images/bgs/train.jpg)';
else if (document.layers)
  document.desc.background='url(../images/bgs/train.jpg)';
}

function changeBgImg_armed_deep(){
if (document.all)
  document.all.desc.style.background='url(../images/bgs/armed.jpg)';
else if (document.getElementById)
  document.getElementById('desc').style.background='url(../images/bgs/armed.jpg)';
else if (document.layers)
  document.desc.background='url(../images/bgs/armed.jpg)';
}