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++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

MM_preloadImages(
//global menu
'/english/common/img/global/global_01_on.gif',
'/english/common/img/global/global_02_on.gif',
'/english/common/img/global/global_03_on.gif',
'/english/common/img/global/global_04_on.gif',
'/english/common/img/global/global_05_on.gif',
'/english/common/img/global/global_06_on.gif',
//footer
'/english/common/img/btn/to_top_on.gif',
'/english/common/img/btn/sitemap_on.gif'
);