Question

In my html, I have an html element with a mouseover event handler.
Can you please tell me if it is possible for me to invoke that event handler programmically in JavaScript?

Answer 1

It is possible. Here’s a cross browser function to fire an event:

function eventFire(el, etype){
    if (el.fireEvent) {
      el.fireEvent('on' + etype);
    } else {
      var evObj = document.createEvent('Events');
      evObj.initEvent(etype, true, false);
      el.dispatchEvent(evObj);
    }
}
// => exmaples
// => eventFire(myDiv,'mouseover');
// => eventFire(myButton,'click');