if(document.images){
	var img01_on = new Image();
	var img01_off = new Image();
	var img02_on = new Image();
	var img02_off = new Image();
	var img03_on = new Image();
	var img03_off = new Image();
	var img04_on = new Image();
	var img04_off = new Image();
	var img05_on = new Image();
	var img05_off = new Image();
	var img06_on = new Image();
	var img06_off = new Image();
	var img07_on = new Image();
	var img07_off = new Image();
}
	function preload(){
	img01_on.src="image/str-top_on.gif";
	img01_off.src="image/str-top.gif";
	img02_on.src="image/cherry-top_on.gif";
	img02_off.src="image/cherry-top.gif";
	img03_on.src="image/pio-top_on.gif";
	img03_off.src="image/pio-top.gif";
	img04_on.src="mini-image/menu-raien1.gif";
	img04_off.src="mini-image/menu-raien0.gif";
        img05_on.src="mini-image/menu-map1.gif";
	img05_off.src="mini-image/menu-map0.gif";
	img06_on.src="mini-image/menu-link1.gif";
	img06_off.src="mini-image/menu-link0.gif";
	img07_on.src="mini-image/menu-hanbai1.gif";
	img07_off.src="mini-image/menu-hanbai0.gif";
	}
	function rollon(img){
	imgon=eval(img+"_on.src");
	if((document.images)&&(imgon)){
		document.images[img].src=eval(img+"_on.src");
		}
	}
	function rolloff(img){
	imgoff=eval(img+"_off.src");
	if((document.images)&&(imgoff)){
		document.images[img].src=eval(img+"_off.src");
		}
	}