javascript variable name same as function parameter code example

Example: can the name of function be the same with name of variable js

If you use a function name as variable name, its value is replaced by 
function body. 
So var a becomes your function a and thus your alert displays function a.

Edit But if you assign value to a like var a = "xya";. 
Then it function will be replaced by variable. As per Order of 
precedence

!!Variable assignment takes precedence over function declaration!!
!!Function declarations take precedence over variable declarations!!