How about this?

Date.prototype.withoutTime = function () { var d = new Date(this); d.setHours(0, 0, 0, 0, 0); return d } 

It allows you to compare the date part of the date like this without affecting the value of your variable:

var date1 = new Date(2014,1,1); new Date().withoutTime() > date1.withoutTime(); // true 

How about this?

Date.prototype.withoutTime = function () { var d = new Date(this); d.setHours(0, 0, 0, 0); return d; } 

It allows you to compare the date part of the date like this without affecting the value of your variable:

var date1 = new Date(2014,1,1); new Date().withoutTime() > date1.withoutTime(); // true