rem: this.set(this.select(function(className) { return className != classNameToRemove; }).join(' ')); 
add: this.element.className.split(/\s+/).select(function(name) { return name.length > 0; })._each(iterator); 
context:     this.set(this.select(function(className) {      return className != classNameToRemove;    }).join(' '));
meta: 4973	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/4973/a66fc3df02a2351eaca597a7b536ab0e0e9e84e5/prototype.js/clean/lib/prototype.js