var renew=false;
   	function show_presentation(){
	    var top=(document.documentElement.scrollTop || document.body.scrollTop);
	    var size=screenSize();
	    if(renew){
	    	$('#presentation').html('<div style="float:right;padding:5px 0 10px 0;"><a href="#" onclick="return hide_presentation();">закрыть</a></div><object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://fpdownload.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=8,0,0,0" width="600" height="400" align="middle"><param name="movie" value="http://www.seobirja.ru/images/partner/partner6.swf?ref=csn9hq8w" /><param name="quality" value="high" /><param name="bgcolor" value="#ffffff" /><embed src="http://www.seobirja.ru/images/partner/partner6.swf?ref=csn9hq8w" quality="high" bgcolor="#ffffff" width="600" height="400" align="middle" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" /></object>');
	    }
	    if(top>0){
	    	$('#presentation').css('top', (parseInt(top)+(size['h']/2-200))+'px');
	    }else{
	    	$('#presentation').css('top', '87px');
	    }
	    $('#presentation').show('slow');
	    return false;
   	}

   	function hide_presentation(){
   		renew=true;
   		$('#presentation').hide('slow', function (){$('#presentation').html('')});
   		return false;
   	}