function preload() {
var img01 = new Image();
var img02 = new Image();
var img03 = new Image();
var img04 = new Image();
var img05 = new Image();
var img06 = new Image();
var img07 = new Image();
var img08 = new Image();
var img09 = new Image();
var img10 = new Image();
var img11 = new Image();
var img12 = new Image();
var img13 = new Image();
img01.src = "../image/global_menu01_on.gif";
img02.src = "../image/global_menu02_on.gif";
img03.src = "../image/global_menu03_on.gif";
img04.src = "../image/global_menu04_on.gif";
img05.src = "../image/lang_en_on.gif";
img06.src = "../image/lang_ch_on.gif";
img07.src = "../image/btn_contact_on.gif";
img08.src = "../image/leftmenu_home_on.gif";
img09.src = "../image/btn_pagetop_on.gif";
img10.src = "../image/special_qa_on.gif";
img11.src = "../image/btn_special_pec_on.jpg";
img12.src = "../image/bnr_network_on.gif";
img13.src = "../image/bnr_partner_on.gif";
}