$(function(){



 	var img = new Array();

	img[0] = "http://okijo.net/include/images/va01.jpg";
	img[1] = "http://okijo.net/include/images/va02.jpg";
	img[2] = "http://okijo.net/include/images/va03.jpg";
	img[3] = "http://okijo.net/include/images/va04.jpg";

	var no = Math.floor((Math.random() * 100)) % img.length;

$("#va").find("img").attr("src",img[no]);

});