Do not declare function and variable with the same name in same scope

In Javascript functions and variables share same namespace  and that is why this code will break

 

<script>         function ThisIsAFunction(n) {             alert(n);         };           var ThisIsAFunction = 'India';           alert('abount to execute');           ThisIsAFunction('Hello');     </script>

 

Basically 1^st statement in code is similar to

var ThisIsAFunction  = function ThisIsAFunction(n) { alert(n); };

 

Or

 

var ThisIsAFunction = = function (n) { alert(n); };

 

and this will collide even inside a closure as closure will be scope rather than global.