function cambia1(og,inte) {
  
  pat = "/img/menu_sx/";
  
  switch(inte) {
   case 1:
    document.getElementById(og).src = pat+og+"on.jpg";
   break;
   case 0:
    document.getElementById(og).src = pat+og+"off.jpg";
   break;   
  }
 }
 
 function cambia2(nome,og,inte) {
  
  pat = "/img/menu_top/";
  
  switch(inte) {
   case 1:
    document.getElementById(nome).src = pat+og+"on.jpg";
   break;
   case 0:
    document.getElementById(nome).src = pat+og+"off.jpg";
   break;   
  }
 }
 
 function cambia3(og,inte) {
  
  pat = "/img/";
  
  switch(inte) {
   case 1:
    document.getElementById(og).src = pat+og+"on.jpg";
   break;
   case 0:
    document.getElementById(og).src = pat+og+"off.jpg";
   break;   
  }
 } 
 
 function cambia4(nome,og,inte) {
  
  pat = "/img/";
  
  switch(inte) {
   case 1:
    document.getElementById(nome).src = pat+og+"on.jpg";
   break;
   case 0:
    document.getElementById(nome).src = pat+og+"off.jpg";
   break;   
  }
 }