function selectCallback(s) 
{ 
 if( s.selectedIndex == -1 ) return; 
 var v = s.options[s.selectedIndex].value; 
return  document.location.href='http://www.vacacionesenperu.com/'+v+'.html'; 
} 
function attachBehaviors() 
{ 
 var s = document.getElementById("select"); 
 if( s ) 
 { 
 s.onchange = function(){selectCallback(s);}; 
 } 
} 
window.onload = attachBehaviors;