function getClientWidth()
{
  return document.compatMode=='CSS1Compat' && !window.opera?document.documentElement.clientWidth:document.body.clientWidth;
}

function getClientHeight()
{
  return document.compatMode=='CSS1Compat' && !window.opera?document.documentElement.clientHeight:document.body.clientHeight;
}



function recent(idr){
 or = document.getElementById('bnt'+idr);
    if(or){ 
or.style.left = (getClientWidth()-800)/2+'px';
or.style.top  = (getClientHeight()-500)/2+'px';
    }
}

function bnt(idb){ 
 ob = document.getElementById('bnt'+idb);
     if(ob){
        ob.style.display = 'block';
    }
    
/*document.getElementsByTagName('body')[0] = 'hidden';*/       

}