function MM_preloadImages() { //v3.0
  var d=document;
  if(d.images){
    if(!d.MM_p){ d.MM_p=new Array(); }
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments;
    for(i=0; i<a.length; i++){
      d.MM_p[j]=new Image;
      d.MM_p[j++].src=imgdir+a[i];
    }
  }
}

function MM_preloadImagesTop() {
  var i;
  a=new Array();
  for(i=2;i<=8;i++){
    a[i-2]='top_btn_00'+i+'r.gif';
  }
  MM_preloadImages(a);
}

function MM_preloadImagesParts() {
  var i,a=new Array("top","lecture","bookmark","event","links","order","detail","association","irrad_history","backnm","books");
  for(i=0;i<a.length;i++){
    a[i]='headbtn_on_'+a[i]+'.gif';
  }
  MM_preloadImages(a);
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr;
  for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++){
    x.src=x.oSrc;
  }
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;
  if(!d){ d=document; }
  if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document;
    n=n.substring(0,p);
  }
  if(!(x=d[n])&&d.all){ x=d.all[n]; }
  for(i=0;!x&&i<d.forms.length;i++){ x=d.forms[i][n]; }
  for(i=0;!x&&d.layers&&i<d.layers.length;i++){ x=MM_findObj(n,d.layers[i].document); }
  if(!x && d.getElementById){ x=d.getElementById(n); }
  return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments;
  document.MM_sr=new Array;
  for(i=0;i<(a.length);i+=1){
    if((x=MM_findObj(a[i]))!=null){
      document.MM_sr[j++]=x;
      if(!x.oSrc){ x.oSrc=x.src; }
      x.src=imgdir+a[i+1];
    }
  }
}