//preload images for previous and next arrows
var imgdir="../../images/";          // The image directory

var prev=new Array(imgdir+"prevdown.gif",imgdir+"prevout.gif",imgdir+"prevover.gif",imgdir+"prevup.gif");
var previmages=new Array()
for (i=0; i < prev.length; i++) {
  previmages[i]=new Image()
  previmages[i].src=prev[i]
}

var next=new Array(imgdir+"nextdown.gif",imgdir+"nextout.gif",imgdir+"nextover.gif",imgdir+"nextup.gif");
var nextimages=new Array()
for (i=0; i < next.length; i++) {
  nextimages[i]=new Image()
  nextimages[i].src=next[i]
}