//top-image-display.js
//トップのイメージをランダムに表示

if(document.getElementById){
	dom.event.addEventListener(window, 'load', setTopImage);
}

function setTopImage(){
	var rmdNum = 2;
	var banner = document.getElementById('banner');
	var imageNum = Math.floor(Math.random()*rmdNum+1);
	banner.style.background = 'url(http://www.uninavi.jp/blog/flower/images/top-image' + imageNum + '.jpg) no-repeat';
}