var popupwindow=nil;


    function popup (mylink, windowname)
      {
        if (! window.focus)return true;
          var href;
        if (typeof(mylink) == 'string')
          href=mylink;
        else
          href=mylink.href;
          popupwindow=window.open(href, windowname, 'width=500,height=324,scrollbars=no,menubar=no,resizable=no');
          return false;
      }

      function purchase(name)
        {
          window.location = "addcart.php?name="+name;
          popupwindow.close();
          return false;
        }