this.set(this.select(function(className) { return className != classNameToRemove; }).join(' ')); 
this.set($A(this).without(classNameToRemove).join(' ')); 
  remove: function(classNameToRemove) {    if (!this.include(classNameToRemove)) return;    this.set(this.select(function(className) {      return className != classNameToRemove;    }).join(' '));  },
6462	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/6462/328e05b227c420e11178ba4eb2eb0e10862b193f/prototype.js/buggy/wp-includes/js/scriptaculous/prototype.js