var ad_img = new Array();
/*ad_img[0] = 'http://www.kenlu.net/forum/KLM/banner/images/bg_20091228_adidas.jpg';
ad_img[1] = 'http://www.kenlu.net/forum/KLM/banner/images/bg_20091228_adidas_2.jpg';
ad_img[2] = 'http://www.kenlu.net/forum/KLM/banner/images/bg_20091228_puma.jpg';
ad_img[3] = 'http://www.kenlu.net/forum/KLM/banner/images/bg_20091228_puma_2.jpg';
ad_img[4] = 'http://www.kenlu.net/forum/KLM/banner/images/bg_20091228_nike.jpg';
ad_img[5] = 'http://www.kenlu.net/forum/KLM/banner/images/bg_20091228_nike_2.jpg';*/

//ad_img[0] = 'http://www.kenlu.net/forum/KLM/banner/images/bg_20100115_nike_zk5_2.jpg';
ad_img[0] = 'http://www.kenlu.net/forum/KLM/banner/images/bg_random_1.jpg';
ad_img[1] = 'http://www.kenlu.net/forum/KLM/banner/images/bg_random_2.jpg';
ad_img[2] = 'http://www.kenlu.net/forum/KLM/banner/images/bg_random_3.jpg';
ad_img[3] = 'http://www.kenlu.net/forum/KLM/banner/images/bg_random_4.jpg';
ad_img[4] = 'http://www.kenlu.net/forum/KLM/banner/images/bg_random_5.jpg';
ad_img[5] = 'http://www.kenlu.net/forum/KLM/banner/images/bg_random_6.jpg';

ad_index = Math.floor(Math.random()*(ad_img.length));
document.write('<style type="text/css">');
document.write('.bg_ad{margin: 0px auto;background-image:url('+ad_img[ad_index]+');background-position:top center;background-repeat:no-repeat;');
document.write('</style>');