//メニュー画像のプリロード
if(navigator.appVersion.charAt(0) >=3){
	listName = new Array("top", "conference", "kikaku", "book", "join", "office", "series", "corres", "link", "useful", "mail", "board");
	
	var image = new Array();
	
	for( i = 0 ; i < 24 ; i++ ){
		image[i] = new Image();
	}
	
	j = 0;
	for( i = 0 ; i < 12 ; i++ ){
		image[j].src = "img/menu/" + listName[i] + "_over.gif";
		j++;
		image[j].src = "img/menu/" + listName[i] + ".gif";
		j++;
	}
}