document.getElementById() VS. getElementById()

Question

It is common for me to register javascript functions for certain events by doing something like:

myBtn.Attributes.Add(\"onClick\", \"Validate(getElementById(         


        

Answer 1

Any function or variable you access without an owning object (ex: document.getElementById) will access the property from window.

So getElementById is actually window.getElementById, which isn't natively defined (unless you defined it before (ex: getElementById = document.getElementById).