(js)自定義事件，並trigger

window.addEventListener("MyEventType", function(evt) {

alert(evt.detail);

}, false);

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var evt = document.createEvent("CustomEvent");

evt.initCustomEvent("MyEventType", true, true, "Any Object Here");

window.dispatchEvent(evt);


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var a = document.createElement('a');
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var evt = document.createEvent('MouseEvents');

// 亦可
var evt = document.createEvent('Event');
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evt.initEvent("click", true, true);

a.dispatchEvent(evt);