Turn on strict mode in javascript

Just a quick tip,
I strongly recommend to add

"use strict";

at the beginning of your javascript files,
this will make your javascript stricter and display errors that normally javascript wouldn't.

For example it will complain about using variables without defining them first.

This requires E ECMAScript 5.

You can also put this in a function

(function(){
    "use strict";
    //some strict code here
 })();

function someFunc () {
    "use strict";
    //some strict code here
}

Nima