function popupmap(mylink, windowname)
{
var winleft = (screen.width -640) / 2;
var winUp = (screen.height - 545) / 2;


if (! window.focus)return true;
  var href;
  if(typeof(mylink) == 'string')
    href=mylink;
  else
    href=mylink.href;
    window.open(href, windowname, 'top='+((screen.height - 545) / 2)+',left='+((screen.width -640) / 2)+'+,toolbar=0 status=0,resizable=0,Width=640,height=545,scrollbars=1');
    
 return false;

}