Date Compare
HTML
<div id="o"></div>
JavaScript
var o = Y.one('#o'),
d = new Date('2010-11-30'),
t = new Date(),
n = new Date(t.getFullYear(), t.getMonth(), t.getDate()),
s = '';
s += '<br>' + d;
s += '<br>' + n;
s += '<br> d < n : ' + (d < n);
s += '<br> d <= n : ' + (d <= n);
s += '<br> d == n : ' + (d.getTime() == n.getTime());
s += '<br> d >= n : ' + (d >= n);
s += '<br> d > n : ' + (d > n);
o.setContent(s);