var imageDir = "/img/common/";
  var preLoadList;
  var action = "false";

  function preLoad(){
    preLoadList = new Array(
      "head_navi_home_d.gif","head_navi_home_e.gif",
      "head_navi_about_d.gif","head_navi_about_e.gif",
      "head_navi_project_d.gif","head_navi_project_e.gif",
      "head_navi_member_d.gif","head_navi_member_e.gif",
      "head_navi_contact_d.gif","head_navi_contact_e.gif");
    onImages = new Array();
    for(field in preLoadList){
      onImages[field] = new Image();
      onImages[field].src = imageDir + preLoadList[field];
    }
    action = "true";
  }

  function changeImage(fileName, imageName){
    if (action == "true"){
      document.images[imageName].src = imageDir + fileName;
    }
  }

  var win_set;
  function opWin(opUrl,winWidth,winHeight){
    win_set = 'toolbar=no,location=yes,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,width='+winWidth+',height='+winHeight;
    openWindow = window.open(opUrl,"jheart",win_set);
    openWindow.focus();
  }

  window.onload = preLoad;


  function writeFalsh(wd){
    document.write(wd);
  }