if(navigator.appVersion.charAt(0) >= 3) {
	var detailBtn = new Array();
	detailBtn[0] = new Image();
	detailBtn[0].src = "images/btn_detail.gif";
	detailBtn[1] = new Image();
	detailBtn[1].src = "images/btn_detail_over.gif";
}

function detailOver(nam, num) {
	if(navigator.appVersion.charAt(0) >= 3) {
		document.images[nam].src = detailBtn[num].src;
	}
}