gistfile1.js

//= require <jquery>
tm.behaviors.popup = $.klass({
  initialize: function(popup) {
    this.popup = popup;
  },
  onclick: $.delegate({
    '.tm-popup-close': function() {
      this.popup.hide();
    },
    '.tm-popup-submit': function() { this.popup.submit.apply(this); }
  }),
  onkeydown: $.delegate({
    'input,textarea': function(e, event) {
      if (!this.popup.parent.multiline && event.keyCode === 13 && (typeof this.popup.submit === 'function')) {
        this.popup.submit.apply(this);
      } else if ( event.keyCode === 27 ) {
        this.popup.hide();
      }
    }
  })
});