var handler={
message:"Event handled.",
handlerFun:function(){
alert(this.message)
}
};

//document.getElementById(‘btnTest‘).onclick=handler.handlerFun;
/* document.getElementById(‘btnTest‘).onclick=function(){
handler.handlerFun();
} */

function bind(fn,context){
return function(){
return fn.apply(context,arguments);
};
}

document.getElementById(‘btnTest‘).onclick=bind(handler.handlerFun,handler);

Event 带参