var cache = Element.extend.cache; 
  function copy(methods, destination, onlyIfAbsent) {    onlyIfAbsent = onlyIfAbsent || false;    var cache = Element.extend.cache;    for (var property in methods) {      var value = methods[property];      if (!onlyIfAbsent || !(property in destination))        destination[property] = cache.findOrStore(value);    }  }
6462	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/6462/0097375444aef03d8cdcdbe6705c1ea088b9b188/prototype.js/clean/wp-includes/js/scriptaculous/prototype.js