//
//<![CDATA[

/* Mouse Over ボタン画像のキャッシュ */
function ImgPreLoad() {
	altimg = new Array;
	altimg['menu_onsen'] = new Array;
	altimg['menu_onsen']['out'] = new Image() ;
	altimg['menu_onsen']['out'].src = "img/butt_onsen.jpg" ;
	altimg['menu_onsen']['on'] = new Image() ;
	altimg['menu_onsen']['on'].src = "img/butt_onsen_on.jpg" ;
	altimg['menu_iken'] = new Array;
	altimg['menu_iken']['out'] = new Image() ;
	altimg['menu_iken']['out'].src = "img/butt_iken.jpg" ;
	altimg['menu_iken']['on'] = new Image() ;
	altimg['menu_iken']['on'].src = "img/butt_iken_on.jpg" ;
}

/* 画像の切り替え */
function alternate(id,sw){
	document.getElementById(id).src = altimg[id][sw].src ;
}
//]]>