Hi I am trying to get the gifference between strings using "google-diff-match-patch",

but I cant get it return the changed text

here is my function:
Code:
	function getDiffs(a, b) {
		a = a.replace(/(<([^>]+)>)/ig,"");
		b = b.replace(/(<([^>]+)>)/ig,"");

		var dmp = new diff_match_patch();
		var d = dmp.diff_main(a, b);
		dmp.cleanupSemantic(d);
		return dmp.diff_prettyHtml(d);
	}

	alert( getDiffs("abcdef", "ab12ef") );
Thanks
Vinny