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();


img01.src = "../img/gaiyou_btn_on.png";
img02.src = "./img/event_btn_on.png";
img03.src = "./img/blog_btn_on.png";
img04.src = "./img/access_btn_on.png";
img05.src = "./img/contact_btn_on.png";
img06.src = "./img/link_btn_on.png";
}