IE issue on CardProduct function

[joanrm20]

I'm using this plugin on some project, but seems that in ie8 this exactly in this part of the function some code is not supported by ie8:
this.name = {
isFilled: this._isCardNameFilled.bind(this),
isValid: this._isCardNameValid.bind(this)
};
this.number = {
isFilled: this._isCardNumberFilled.bind(this),
isValid: this._isCardNumberValid.bind(this)
};
this.exp = {
isFilled: this._isCardExpirationFilled.bind(this),
isValid: this._isCardExpirationValid.bind(this)
};
this.cvc = {
isFilled: this._isCardCVCFilled.bind(this),
isValid: this._isCardCVCValid.bind(this)
};

So always the console of ie is showing me an error("Object doesn't support this property or method").
The plugin works really fine even with this error, I just added a try catch sentence and if the error happens this sentence will handle the error an avoid send it to the user.

I don't know if there are another way to solved it? In my case this works for me. could be helpful for someone while a patch or a better solution is applied for this. :)

PS: just trying to help