// function that displays a slideshow
function popup(pageURL, windowname, w, h)
{
if (! window.focus)return true;
var href;
var left = (screen.width/2)-(w/2);
var top = (screen.height/2)-(h/2);
if (typeof(pageURL) == 'string')
   href=pageURL;
else
   href=pageURL.href;
window.open(href, windowname, 'toolbar=no, location=no, directories=no, status=no, menubar=no, scrollbars=no, resizable=no, copyhistory=no, width='+w+', height='+h+', top='+top+', left='+left);
return false;
}