[EXT Develop Log]--MISC

1.Change icon of toolbar.button :
    In EXT API, we know ,toolbar.button can change text,handler,disable etc. with setter  method ;but no setter method with icon,tooltip and cls.   
    How to update them?
  

js 代码

handler : function(){
    this.el.child('button:first').dom.style.backgroundImage = 'url(/images/icon.gif)';
    this.el.child('button:first').dom.qtip= 'new tooltip';
}

---