function redir() 
{ 
  var resolution = ""; 
  
  if(screen.width<1024) 
  resolution = "800"; 
  
  else if(screen.width>1023) 
  resolution = "1024"; 

  else 
  resolution = "800"; 
  return resolution; 
} 
document.write('<link href="include/' + redir() + 'stylesheet.css" rel=stylesheet type="text/css" />');