function showAd(ad_url,ad_width,ad_height){
	document.write('<object height="'+ad_height+'" width="'+ad_width+'" border="0" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=9,0,0,0" classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000">');
	document.write('<param name="movie" value="http://www.sion.com/comun/banners/swf/'+ad_url+'.swf"/>');
	document.write('<param name="quality" value="autohigh"/>');
	document.write('<param name="LOOP" value="true"/>');
	document.write('<param name="wmode" value="opaque"/>');
	document.write('<embed height="'+ad_height+'" width="'+ad_width+'" border="0" quality="autohigh" type="application/x-shockwave-flash" wmode="opaque" loop="true" pluginspage="http://www.macromedia.com/shockwave/download/index.cgi?P1_Prod_Version=ShockwaveFlash" src="http://www.sion.com/comun/banners/swf/'+ad_url+'.swf" allowscriptaccess="always"/>');
	document.write('</object>');
}