How do I create a new object in javascript based on a type-string?

Question

How do I create a new object in javascript based on a variable type-string (containing the name of the object)?

Now I have: (with more tools coming the list will get lon

Answer 1

function getTool(name){
  return ( typeof window[name] === 'function' ) ? 
                                    new window[name]() : {/*some default*/};
}

Assumes PointerTool constructor is defined in the global window namespace. Replace that with whatever namespace you're using.