Call a JavaScript function name using a string?

Question

How can I hook up an event to a function name I have defined as a string?

I'm using Prototype.js, although this is not Prototype-speficic.

$(inputId).observe('click', formData.fields[x].onclick); 

This would result in JavaScript complaining that my handler is not a function. I would prefer not us use eval().

Answer 1

Property accessors can be used to access any object's properties or functions.

If the function is in the global scope, you can get it using the window object:

var myFunc = window[myFuncName]; 

This also works within the this scope:

var myFunc = this[myFuncName];