Speech it

gistfile1.js

var current = null;
var originalStyle = '';

document.onmouseover = function(e) {
    current = document.elementFromPoint(e.clientX, e.clientY);
    originalStyle = current.style;
    current.style = 'background: rgba(255, 0, 0, 0.2)';
    if (window.speechSynthesis) {
        var synth = speechSynthesis;
        var message = current.textContent;
        var utter = new SpeechSynthesisUtterance(message);
        utter.lang = "ja-JP";
        current.onmouseup = function(ev) {
            ev.stopPropagation();
            synth.speak(utter);
        }
    }
}

document.onmouseout = function(e) {
    current.style = originalStyle;
}