Function.prototype.bind

bind.js

// See https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Function/bind
// for a more verbose-but-standards-compliant version.
if (!Function.prototype.bind) {
    Function.prototype.bind = function(context){
        var fn = this, args = [].slice.call(arguments, 1);
        return function(){
            return fn.apply( context, args.concat([].call(arguments)) );
        };
    };
}