if (document.images){

	sm01on = new Image();
	sm01on.src = "img/btn-map-2.gif";

	sm02on = new Image();
	sm02on.src = "img/btn-detail-2.gif";


	sm01off = new Image();
	sm01off.src = "img/btn-map-1.gif";

	sm02off = new Image();
	sm02off.src = "img/btn-detail-1.gif";

}

function smOn(imgName){
	if(document.images){
		document[imgName].src = eval(imgName + "on.src");
	}
}


function smOff(imgName){
	if(document.images){
		document[imgName].src = eval(imgName + "off.src");
	}
}