nownum = 0;
function ChangePartsImg(num){
	var listnum = document.getElementById("parts_img").src.split("parts_img_")[1].charAt(0);
	if(num < 10){
		num = "0" + num;
	}
	document.getElementById("parts_img").src = "/course/parts_course/img/parts_img_" + listnum + num + ".gif";
}


function LoadChangeDisplay(){
	if(window.addEventListener) {
		window.addEventListener("load", function(){
			ChangePartsImg(nownum);
		}, false);
	}
	else if(window.attachEvent) {
		window.attachEvent("onload", function(){
			ChangePartsImg(nownum);
		});
	}
}