var menuButton = new Array(
	"/img/menu_top_on.png",
	"/img/menu_top_off.png",
	"/img/menu_top_here.png",
	"/img/menu_cocolog_on.png",
	"/img/menu_cocolog_off.png",
	"/img/menu_cocolog_here.png"
);

var msgArray = new Array(
	"urx.jp のトップページに移動します",
	"tDiary を利用した日記です"
);


function preloadImg(){
	preImg= new Array();
	for (i=0; i<menuButton.length; i++){
		prImg[i] = new Image();
		prImg[i].src = menuButton[i];
	}
}
function switchMenuOn(menuid, name) {
	document.menu[menuid].src  = "/img/menu_" + name + "_on.png";
	document.msgarea.msg.value = message = msgArray[menuid];
}
function switchMenuOff(menuid, name) {
	document.menu[menuid].src  = "/img/menu_" + name + "_off.png";
	document.msgarea.msg.value = message = "";
}
function switchMenuHere(menuid, name) {
	document.menu[menuid].src  = "/img/menu_" + name + "_here.png";
	document.msgarea.msg.value = message = "";
}