function NewWindow(url)
   {var wl,wt,ww,wh,wp,new_window;
   if(screen.width>640){ww=790;wh=450;}else{ww=630;wh=330;}
   wl=((screen.width-ww)/2)-5;
   wt=((screen.height-wh)/2)-75;
   wp='height='+wh+',width='+ww+',top='+wt+',left='+wl+',scrollbars=yes,resizable=yes,menubar=yes,status=yes,directories=yes,location=yes'
   new_window=window.open(url,'store',wp)
   if(parseInt(navigator.appVersion)>=4){new_window.window.focus();}}