Ext中一次给一个组件注册多个事件

function a(){
var lab=Ext.get("testL");
lab.on({'click':{fn:fn,scope:this,delay:100},
'mouseover':{fn : fn1,scope:this},
'mouseout':{fn : fn2,scope:this}});
}
    Ext.onReady(function(){
    Ext.get("testInput").addListener("click",a);
    });
function fn(){
alert('OnClick');
}
function fn1(){
alert('OnMouseOver');
}
function fn2(){
alert('OnMouseOut');
}