This project is for 6 setPrototypeOf ECMA and ECMA 5 getPrototypeOf javascript function implementations. That's because, unfortunately, the 'set', there is still nowhere to be implemented natively.  The accompanying 'set' works on all browsers supporting ECMA 5. Compatible up to (the 'isPrototypeOf' ECMA is from 3 to complete the picture) - the 'get' all the way ECMA third