I have created a date in javascript so:
var thisDate = new Date();
thisDate.setHours(0);
thisDate.setMinutes(0);
thisDate.setSeconds(0);
thisDate.setMilliseconds(0);
According to Chrome debugger tooltip when I hover the mouse over the variable:
Fri Mar 15 2013 00:00:00 GMT-0400 (Easte...
> __proto__: Invalid Date