
<!--- navigation --------------------------------- --->
	var imageDir = "image/";
	var preLoadList;
	var action = "false";

	function preLoad(){
		preLoadList = new Array(
			"pic_0101d.gif", "pic_0101e.gif",
			"pic_0201d.gif", "pic_0201e.gif",
			"pic_0301d.gif", "pic_0301e.gif",
			"pic_0401d.gif", "pic_0401e.gif",
			"pic_0501d.gif", "pic_0501e.gif");
		onImages = new Array();
		for(field in preLoadList){
			onImages[field] = new Image();
			onImages[field].src = imageDir + preLoadList[field];
		}
		action = "true";
	}

	function changeImage(fileName, imageName){
		if (action == "true"){
			document.images[imageName].src = imageDir + fileName;
		}
	}
<!--- /navigation -------------------------------- --->