for (var i = 0; i < this.length; i++) 
for (var i = 0, length = this.length; i < length; i++) 
  indexOf: function(object) {    for (var i = 0; i < this.length; i++)      if (this[i] == object) return i;    return -1;  },
6445	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/6445/81ea0800bc8ad92d491743716cd489cad7333723/prototype.js/clean/vendor/rails/railties/html/javascripts/prototype.js