JavaScript: Call a string as a function with arguments

Man, I sure had trouble giving a proper name to this post.

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1.// Convert string to a function reference

2.var strFun = "myFunctionName";

3.var func = eval(strFun);

4. 

5.if (typeof func == 'function') {

6.  // call it

7.  func(param1, param2);

8.}

The string "strFun" is converted to a function "func". If func() checks out to be a valid function using typeof to check if the function exists, then we just call it with the arguments it needs.