// Preload the Day/Night buttons for the rollovers

  if (document.images)  {
    viewPic1a=new Image();     viewPic1b=new Image();
    viewPic2a=new Image();     viewPic2b=new Image();
    viewPic3a=new Image();     viewPic3b=new Image();
    viewPic4a=new Image();     viewPic4b=new Image();

    viewPic1a.src="images/day_off.gif";     viewPic1b.src="images/day_on.gif";
    viewPic2a.src="images/night_off.gif";   viewPic2b.src="images/night_on.gif";
    viewPic3a.src="images/day_off.gif";     viewPic3b.src="images/day_on.gif";
    viewPic4a.src="images/night_off.gif";   viewPic4b.src="images/night_on.gif";
}


// Functions to show and hide the image moused over

  function hiLite(liteImg) {
    if (document.images && !document.layers) {
        document.images[liteImg].src =  eval(liteImg + "b.src");
    }
    else if (document.images) {
        document.viewDiv.document.view1.document.images[liteImg].src =  eval(liteImg + "b.src");
        document.viewDiv.document.view2.document.images[liteImg].src =  eval(liteImg + "b.src");
    }
    return false;
}

  function hiLiteOff(liteImg) {
    if (document.images && !document.layers) {
        document.images[liteImg].src =  eval(liteImg + "a.src");
    }
    else if (document.images) {
        document.nitenday.document.view1.document.images[liteImg].src =  eval(liteImg + "a.src");
        document.nitendat.document.view2.document.images[liteImg].src =  eval(liteImg + "a.src");
    }
    return false;
}



// Show and hide the appropriate Day/Night view

function show(on,off) {
  if (document.getElementById) {
      document.getElementById(on).style.visibility='visible';
      document.getElementById(off).style.visibility='hidden';
  }
  else if (document.all) {
      document.all[on].style.visibility = "visible";
      document.all[off].style.visibility = "hidden";
  }
  else if (document.layers) {
      document.viewDiv.document.layers[on].visibility = "show";
      document.viewDiv.document.layers[off].visibility = "hide";
   }
   else {
     return false;
   }
}