mouseleave to original image
function createHover (that) {
var original = document.getElementsByClassName("image_left"); // attempt
that.addEventListener('mouseover', function() {
var src = that.getAttribute('data-src');
if (src) {
imageContainer.src = src;
}
});
that.addEventListener('mouseleave', function() {
// imageContainer.src = original;
});
}
initImageHover('li.one > a');
});