function img()
{
	var img = new Array();
	img[0] = "bkbb.jpg";
	img[1] = "cskx.jpg";
	img[2] = "dh.jpg";
	img[3] = "fcxw.jpg";
	img[4] = "gszj.jpg";
	img[5] = "lykx.jpg";
	img[6] = "mrxq.jpg";
	img[7] = "nbanews.jpg";
	img[8] = "ozsczb.jpg";
	img[9] = "ttxw.jpg";
	img[10] = "xxsb.jpg";
	img[11] = "ylq.jpg";
	img[12] = "zczxzb.jpg";
	img[13] = "zsjxw.jpg";

	document.getElementById("bottom_ad").innerHTML = "";
	document.getElementById("bottom_ad").innerHTML = "<img src=\"../../../ad_img/"+img[Math.floor(Math.random()*(img.length-1))]+"\" alt=\"\" />";
	//document.getElementById("bottom_ad").innerHTML = "<img src=\"ad_img/"+img[Math.floor(Math.random()*(img.length-1))]+"\" alt=\"\" />";
}
img();
window.setInterval("img()", 10000);