resize_textareas.js

/*
 * Scale all textareas dynamically on the page
 * Requires Prototype
 */
Event.observe(window, 'load', function() {
  $$('textarea').each(function(t){
    t.scale = function (){
      this.style.height = $F(this).split('\n').size() + 8 + "em";
       setTimeout(function(thisObj){ thisObj.scale(); }, 1000, this);
    };
    t.scale();
  })
});