gistfile1.js

$(function() {
	
	function isValidTarget(node) {
		return /^img|canvas$/i.test(node.nodeName);
	};
	
	$('div.entry table tbody td span').mouseenter(function(e) {
		var target = e.target;
		if (isValidTarget(target)) {
			var img = new Image();
			img.src = target.src || target.imgsrc;
			img.setAttribute("style", target.getAttribute("style"));
			target.parentNode.replaceChild(img, target);
		}
	}).mouseleave(function(e) {
		var target = e.target;
		if (isValidTarget(target)) {
			Pixastic.process(target, "desaturate", false);
		}
	});
	
});