The following code seems to work in Firefox but not in Chrome:
var d = Date.parse("Sep 23, 2012 24:0:0");
alert (d);
It alerts the milliseconds in Firefox but I get a NaN in Chrome.
Of course, the last 3 numbers (24:0:0) might not be counted as a 'date', but I'd like to have a simple solution to this to make the code work cross-browser.