function menuSwap(menuID,pageID){
  for(i=1;i<=5;i++){
    if(i != pageID){
      newImage = "url('images/menu_bg.jpg')" ;
      divID = document.getElementById("button"+i);
      divID.style.backgroundImage = newImage;
      divID.style.color = "#454a5c";
    }
  }

  if(menuID > 0){
    newImage = "url('images/menu_bg_"+menuID+".jpg')" ;
    divID = document.getElementById("button"+menuID);
    divID.style.backgroundImage = newImage;
    divID.style.color = "#FFFFFF";
  }
}