//画像イメージ実体の生成
if(document.images){
  var menu_home_ovr    = new Image();
  var menu_home_off    = new Image();
  var menu_bg_ovr      = new Image();
  var menu_bg_off      = new Image();
  var menu_outline_ovr = new Image();
  var menu_outline_off = new Image();
  var menu_rule_ovr    = new Image();
  var menu_rule_off    = new Image();
  var menu_sponsor_ovr = new Image();
  var menu_sponsor_off = new Image();
  var menu_contact_ovr = new Image();
  var menu_contact_off = new Image();
  var menu_1st_ovr     = new Image();
  var menu_1st_off     = new Image();
  var menu_2nd_ovr     = new Image();
  var menu_2nd_off     = new Image();
  var menu_3rd_ovr     = new Image();
  var menu_3rd_off     = new Image();
  var menu_4th_ovr     = new Image();
  var menu_4th_off     = new Image();
}
//画像の割り当てプリロード
function preLoad(){
  menu_home_ovr.src    = "../img/jmenu_home_ovr.gif";
  menu_home_off.src    = "../img/jmenu_home.gif";
  menu_bg_ovr.src      = "../img/jmenu_bg_ovr.gif";
  menu_bg_off.src      = "../img/jmenu_bg.gif";
  menu_outline_ovr.src = "../img/jmenu_outline_ovr.gif";
  menu_outline_off.src = "../img/jmenu_outline.gif";
  menu_rule_ovr.src    = "../img/jmenu_rule_ovr.gif";
  menu_rule_off.src    = "../img/jmenu_rule.gif";
  menu_sponsor_ovr.src = "../img/jmenu_sponsor_ovr.gif";
  menu_sponsor_off.src = "../img/jmenu_sponsor.gif";
  menu_contact_ovr.src = "../img/jmenu_contact_ovr.gif";
  menu_contact_off.src = "../img/jmenu_contact.gif";
  menu_1st_ovr.src     = "../img/jmenu_1st_ovr.gif";
  menu_1st_off.src     = "../img/jmenu_1st.gif";
  menu_2nd_ovr.src     = "../img/jmenu_2nd_ovr.gif";
  menu_2nd_off.src     = "../img/jmenu_2nd.gif";
  menu_3rd_ovr.src     = "../img/jmenu_3rd_ovr.gif";
  menu_3rd_off.src     = "../img/jmenu_3rd.gif";
  menu_4th_ovr.src     = "../img/jmenu_4th_ovr.gif";
  menu_4th_off.src     = "../img/jmenu_4th_next.gif";
}
// カーソルがのったときの処理
function rollon(img){
  imgon=eval(img+"_ovr.src");
  if ((document.images)&&(imgon)){
    document.images[img].src=eval(img+"_ovr.src");
  }
}
// カーソルが外れたときの処理
function rolloff(img){
  imgoff=eval(img+"_off.src");
  if((document.images)&&(imgoff)){
    document.images[img].src=eval(img+"_off.src");
  }
}

// ミニウィンドウを開く
function miniwin(arg,arg2,arg3){
  window.open(arg,"readme","width="+arg2+",height="+arg3+",scrollbars=1");
}