var pp_open=false,  pp_window=null;

function checkWindow()
{   if ( pp_open )
    { if ( pp_window == null ) pp_window=window.open('',"paypal");
      if ( pp_window.closed ) {  pp_window=null;  return true; }
      pp_window.focus();
    }
    pp_open=true;
    return true;
}

function highlightPF() 
{  nd = document.getElementById('portfolio');
   nd.style.color = "#fc0";
   nd.style.borderBottomColor="#fc0"
}

function normalPF() 
{  nd = document.getElementById('portfolio');
   nd.style.color = "#fff";
   nd.style.borderBottomColor="#ccc";
}

function preloadImages(imgs)
{   var img;
    if (document.images)  
    {   for (var i=0; i < imgs.length; i++)
        {    img = new Image();
             img.src = imgs[i];
        }
    }
}