var s_width =''; 
var s_height =''; 
s_width=screen.width 
s_height=screen.height
nome=document.URL
ll=nome.length
r=ll-4 
pos=new String(nome)
nome=pos.substring(r,0);


if (s_width == "640"){  
} 

if ((s_width == "800") && (s_height == "600"))  { location.href= "index800.php" } 

if (s_width >= "1024"){  } 

//if (s_width == "1152"){ 
//location.href=nome + "1152_x_864.php"; 
//} 

//if (s_width == "1280"){ 
//location.href=nome + "1280_x_1024.php"; 
//}