if(document.images) {
	var imgs = new Array();
	imgs[0] = new Image();  imgs[0].src = "images/bu_image02_red.gif";
	imgs[1] = new Image();  imgs[1].src = "images/bu_image02.gif";
	imgs[2] = new Image();  imgs[2].src = "images/bu_image02_blue.gif";
	imgs[3] = new Image();  imgs[3].src = "images/bu_image02.gif";
	imgs[4] = new Image();  imgs[4].src = "images/bu_image02_green.gif";
	imgs[5] = new Image();  imgs[5].src = "images/bu_image02.gif";

}
function chgimg(id, imgname) {
	if(document.images) {
		if(imgs[imgname]) {
			document.images[id].src = imgs[imgname].src;
		}
		else {
			document.images[id].src = imgname;
		}
	}
}

//背景画像の表示切替（編集しなくても平気）
function cngFrmBG(e,image){
	if(navigator.userAgent.indexOf("MSIE 6",0) >= 0){
		var N=window.event? event.srcElement: e.target
		if (N.tagName=="INPUT")
		N.style.backgroundImage="url"+"('"+image+"')"
	} else if(navigator.userAgent.indexOf("MSIE 7",0) >= 0){
		var N=window.event? event.srcElement: e.target
		if (N.tagName=="INPUT")
		N.style.backgroundImage="url"+"('"+image+"')"
	}
}