이미지 랜덤으로 뿌리기, 단 이전 이미지를 기억하여 똑같이 보이지는 않도록.

gistfile1.js

//<![CDATA[
		$(function(){
			var $wrap = $("#js-section0101");
			var imageArr = ["/asan/images/main/section0101_bg.png", "/asan/images/main/section0101_bg2.png", "/asan/images/main/section0101_bg3.png"];
			var oldNum;
			var num = ~~(Math.random()*imageArr.length);

			if(window.localStorage){
				oldNum = Number(window.localStorage.getItem('section0101_ranomNum'));
				
				while(oldNum === num){
					num = ~~(Math.random()*imageArr.length);
				}
			}
			
			window.localStorage && window.localStorage.setItem('section0101_ranomNum', num);
			$wrap.css("background-image", "url("+imageArr[num]+")");
		});
		//]]>