// JavaScript Document
function newImage(arg) {
  if (document.images) {
    rslt = new Image();
    rslt.src = arg;
    return rslt;
  }
}

function changeImagesArray(array) {
  if (preloadFlag == true) {
    var d = document; var img;
    for (var i=0; i<array.length; i+=2) {
      img = null; var n = array[i];
      if (d.images) {img = d.images[n];}
      if (!img && d.getElementById) {img = d.getElementById(n);}
      if (img) {img.src = array[i+1];}
    }
  }
}

function changeImages() {
  changeImagesArray(changeImages.arguments);
}


var preloadFlag = false;
function preloadImages() {
  if (document.images) {
    pre_left_button_01_over = newImage('http://expo.nikkeibp.co.jp/hc/common/img/left_button_01_over.gif');
    preloadFlag = true;
  }
}




function openExb(href){
  window.open( href, 'new_window_name', 'height=500, width=547, resizable=NO, scrollbars=YES');
}