function PreloadImages(rp){
  Loaded = 0;
  // store in array a: the different page designation codes
  var a=new Array("hom","eve","spi","vol","foo","con")
  // store in array b: the image name ending, using specific order:
  //     CurrentPage, MouseOver, MouseOut, MouseDown
  var b=new Array("-ws","-os","-ns","-ds")
  // store in variable ext the image extension
  // i & j are simple ForEach counters
  var i,j,ext=".jpg",d=document
  if(!d.Vx) d.Vx=new Array();
  for(i=0;i<a.length;i++){
    for(j=0;j<b.length;j++){
      d.Vx[a[i]+b[j]]=new Image; d.Vx[a[i]+b[j]].src=rp+"images/page/nav-"+a[i]+b[j]+ext
//      alert(a[i]+b[j]);
//      alert("image loaded: "+d.Vx[a[i]+b[j]].src);
    }
  }
  Loaded = 1;
}
function ImgOvr(Ax){
  var d=document; d.images[Ax].src=d.Vx[Ax+"-os"].src
}
function ImgOut(Ax){
  var d=document; d.images[Ax].src=d.Vx[Ax+"-ns"].src
}
function ImgDwn(Ax){
  var d=document; d.images[Ax].src=d.Vx[Ax+"-ds"].src
}