gistfile1.js

var p = $('myName');
var f = p.up('form');
f.observe('submit', function(evt){
  var next = 'http://www.myphotosession.com/';
  if(p.present()){
    evt.stop();
    next += encodeURIComponent($F(p));
    window.location.replace(next);
  }
});