function Li_put_logo_here () {
	var logos_list = new Array(
		"http://www.linux-index.org/images/li_logo.gif",
		"http://www.linux-index.org/ads/small/143x59_li_logo.png"
	);
	var rand_logo_element = Math.round((logos_list.length-1)*Math.random());
	document.write('<a href="http://www.linux-index.org/"><img src="'+logos_list[rand_logo_element]+'" border="0" alt="Li logo"/></a>');
}

Li_put_logo_here();