Hello, Shun Lin.
In previous version of cocos2d-html5 (Cocos2d-html5-v0.5.0-alpha2) in file CCDirectod.js keypad dispatcher inited by this way:
this.keypadDispatcher = new cc.KeypadDispatcher;
This is wrong. But now I see the new version of cocos2d and ther in CCDirector.js keypad dispatcher inited by this way:
this.keyboardDispatcher = cc.KeyboardDispatcher.getInstance();
And this is correct. So, you don’t need any updates in this error, because the new version is all fixed.