Function.prototype.bind = function(obj) {
var slice = [].slice,args = slice.call(arguments,1),self = this,nop = function() {
},bound = function() {
return self.apply(this instanceof nop ? this : (obj || {}),args.concat(slice.call(arguments)));
};

nop.prototype = self.prototype;

bound.prototype = new nop();

return bound;
};
}