//------------------------------ Cambio de colores del men�
function moveinC(which){
which.style.color='#305F50'
}
function moveoutC(which){
which.style.color='#000000'
}

<!--
// botones...
if(document.images) {
		iniciooff = new Image();
		iniciooff.src = "../images/bt_inicioOFF.gif";
		inicioon = new Image();
		inicioon.src = "../images/bt_inicioON.gif";
		
		listaoff = new Image();
		listaoff.src = "../images/bt_listaOFF.gif";
		listaon = new Image();
		listaon.src = "../images/bt_listaON.gif";
		
		registrooff = new Image();
		registrooff.src = "../images/bt_registroOFF.gif";
		registroon = new Image();
		registroon.src = "../images/bt_registroON.gif";
		
		favoritosoff = new Image();
		favoritosoff.src = "../images/bt_favoritosOFF.gif";
		favoritoson = new Image();
		favoritoson.src = "../images/bt_favoritosON.gif";
}

function onoff(imgName,state) {
        if(document.images) {               
		document.images[imgName].src = eval(imgName+state+".src");
        }
}         


//-->


function MM_jumpMenu(targ,selObj,restore){ //v3.0
  eval(targ+".location='"+selObj.options[selObj.selectedIndex].value+"'");
  if (restore) selObj.selectedIndex=0;
}



// --------------------  Otras funciones
function isEmpty(s)
{ return ((s == null) || (s.length == 0))
}


function isWhitespace(s)
{ var i,rs;
  rs = false; 
  if (isEmpty(s)) rs = true; 
  for (i = 0; i < s.length; i++)
  {
    if (s.charAt(i) == " ") rs = true;
  }
  return rs;
}



// --------------------  Comprueba la validez del E-Mail
function isEMail(s)
{  if (isEmpty(s))
       if (isEMail.arguments.length == 1) return false;
       else return (isEMail.arguments[1] == true);

   if (isWhitespace(s)) return false;
   
   var i = 1;
   var sLength = s.length;

   while ((i < sLength) && (s.charAt(i) != "@"))
   { i++
   }
   if ((i >= sLength) || (s.charAt(i) != "@")) return false;
   else i += 2;

   while ((i < sLength) && (s.charAt(i) != "."))
   { i++
   }
   if ((i >= sLength - 1) || (s.charAt(i) != ".")) return false;
   else return true;   
}