/*
	イメージのロールオーバー
	2007.10.11 (c) fujiwara@khaibit.jp

	汎用タイプ
	http://www.coolwebwindow.com/weblife_column/coolweb/000128.php
	<img src="image_off.gif" alt="menu" id="image1" 
		onMouseOver="ImgChange('image1','image_on.gif')" 
		onMouseOut="ImgBack('image1')">
*/

var defImg;
function ImgChange(target, img){
	if(document.getElementById){
		defImg = document.getElementById(target).getAttribute("src");
		document.getElementById(target).setAttribute("src", img);
	}
}
function ImgBack(target){
	if(document.getElementById){
		document.getElementById(target).setAttribute("src",defImg);
	}
}