detect HTML DOM內容有異動

當某個div, span, p內容有異動會想連帶做些什麼事時,這個可就好用了

jquery version:

$('mydiv').bind("DOMSubtreeModified",function(){
  alert('changed');
});
// javascript version
someElement.addEventListener("DOMAttrModified", function() {
  //...
}, false);