SOURCE

Function.prototype.myBind = function(context){
    if(typeof this !== 'function'){
        throw ner Error('...')
    }

    var self = this
    var args = Array.prototype.slice.call(arguments, 1)

    var fNull = function(){}

    var fBind = function(){
        var bindArgs = Array.prototype.slice.call(arguments)
        return self.apply(this instanceof fBind ? this : context, args.concat(bindArgs))
    }
    fBind.prototype = this.prototype
    fBind.prototype = new fNull()
    return fBind
}