function PreImg(){
	preload_et01=new Image();preload_et01.src="./img/et01x.gif";
	preload_et02=new Image();preload_et02.src="./img/et02x.gif";
	preload_et03=new Image();preload_et03.src="./img/et03x.gif";
	preload_et04=new Image();preload_et04.src="./img/et04x.gif";
	preload_et05=new Image();preload_et05.src="./img/et05x.gif";
	preload_et06=new Image();preload_et06.src="./img/et06x.gif";
}