Wednesday, July 21, 2010

What element mouse comes from or goes to

Sometimes we want to know where the mouse comes from or goes to in case of mouseover / mouseout event. Assume, we have assigned to any HTML element a mouseout listener mouseOut. We can easy acquire the source (from element) and target (to element) by fired event.
function mouseOut(evt)
    evt = (evt) ? evt : ((window.event) ? window.event : "");
    var fromElement = ( ? : evt.srcElement;
    var toElement = (evt.relatedTarget) ? evt.relatedTarget : evt.toElement;
    // do something with fromElement / toElement
Easy. Is not?

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