il tuo script dice
codice:
<script language="javascript"> 
<!-- 
var s_width =''; 
s_width=screen.width 

if (s_width == "800"){ 
location.href="homepage/home8x6.htm"; 
} 

if (s_width == "1024"){ 
location.href="homepage/home1024.htm"; 
} 

//--> 
</script>
prova con qualcosa come
codice:
<script language="javascript"> 
<!-- 
var s_width =s_width=screen.width;

if (s_width == "1024"){ 
location.href="homepage/home1024.htm"; 
} 

else { 
location.href="homepage/home8x6.htm"; 
} 

//--> 
</script>
ciao