Event.observe(window, 'load', yan_300x100, false);
function yan_300x100(){
  var url    = '/fra_ad_300x100.php?id=yan_300x100';
	var pars   = '';
	var target = 'div-yan_300x100';
	var myAjax = new Ajax.Updater(target, url, {	method: 'get',	parameters: pars});
}