var flag=false;
var Buttons = new Array(
	"b_sdjb_l_1",
	"b_sdjb_l_2",
	"b_sdjb_l_3",
	"btn_kago_all",
	"btn_kago_one"
);
var OverImg = new Array();
function init(){
	if(document.images) {
		for(i=0; i<Buttons.length; i++){
			OverImg[Buttons[i]] = new Image();
			OverImg[Buttons[i]].src = dir + "images/" + Buttons[i] + "_on.gif";
		}
	}
	flag=true;
}
function _on(n,i){
	if(document.images&&flag) document.images[i].src = OverImg[n].src;
}
function _off(n,i){
	if(document.images&&flag) document.images[i].src = dir + "images/" + n + ".gif";
}