Test DOMAttrModified support
by leaverou
JavaScript
var i = 0;
document.body.addEventListener('DOMAttrModified', function(evt){
i++;
}, false);
document.body.setAttribute('foo', 'initial');
document.body.setAttribute('foo', 'changed');
document.body.removeAttribute('foo');
alert('DOMAttrModified fired ' + i + ' times');