var d=document;
var ramdom_number;
var place_loc_ad;
var d=document;

function get_random()
{
    var ranNum= Math.floor(Math.random()*3);
    return ranNum;
}

if( typeof( beenhere ) == 'undefined' )
{
	var beenhere=0;
	random_number=get_random();
}
else
{
	beenhere++;

}

if(beenhere == random_number)
{
	place_loc_ad=1;
}
else
{
	place_loc_ad=0;
}

d.write('<iframe name="niffmail_ad_frame" width='+google_ad_width+' height='+google_ad_height+' frameborder="0" src="http://www.nifmail.com/gad.php?'+google_ad_height+'+'+google_ad_width+'+'+google_ad_format+'+'+myturf_serial+'+'+place_loc_ad+'" marginwidth="0" marginheight="0" vspace="0" hspace="0" allowtransparency="true" scrolling="no">');
d.write("</iframe>")