如何消除事件起泡

[wll929]

我写了一段代码如下：
function buttonclickhandler(){
alert("The onclick event was handled by button1clickhandler()
event.cancelbubble=true
}
function formclickhandler(){
alert("The onclick event was handled by formclickhandler()")
}
希望点击按扭后不触发formclickhandler()事件，可是在vb.net中运行后还是会触发formclickhandler()事件，不知如何解决？？？？