function check(){
   var name = document.getElementById('name');
   var email = document.getElementById('email');
   var message = document.getElementById('message');
   if(name.value == "" || email.value == "" || message.value == "" ){
  alert("Todos los campos son obligatorios");
  return false ;		
  }
  return true;


}
function more_results() {
document.getElementById('more').style.display='block';
}

function favorites(title, url) {
    if (window.sidebar) {
        // ff
        window.sidebar.addPanel(title, url, '');
    } else if (window.opera && window.print) {
        // opera
        var elem = document.createElement('a');
        elem.setAttribute('href', url);
        elem.setAttribute('title', title);
        elem.setAttribute('rel',' sidebar');
        elem.click();
    } else if (document.all) {
        // ie
        window.external.AddFavorite(url, title);
    };
};
function swap(){

 var x = document.con.from.value;
 var y = document.con.to.value;
 
 document.con.from.value = y;
 document.con.to.value = x;
 
}