Determining Date Equality in Javascript

Question

I need to find out if two dates the user selects are the same in Javascript. The dates are passed to this function in a String ("xx/xx/xxxx").That is all the granularity I need.

Here is my code:

        var valid = true;     var d1 = new Date($('#datein').val());     var d2 = new Date($('#dateout').val());     alert(d1+"\n"+d2);     if(d1 > d2) {         alert("Your check out date must be after your check in date.");         valid = false;     } else if(d1 == d2) {         alert("You cannot check out on the same day you check in.");         valid = false;     } 

The javascript alert after converting the dates to objects looks like this:

Tue Jan 25 2011 00:00:00 GMT-0800 (Pacific Standard Time)

Tue Jan 25 2011 00:00:00 GMT-0800 (Pacific Standard Time)

The test to determine if date 1 is greater than date 2 works. But using the == or === operators do not change valid to false.

Answer 1

Use the getTime() method. It will check the numeric value of the date and it will work for both the greater than/less than checks as well as the equals checks.

EDIT:

if (d1.getTime() === d2.getTime()) 

Answer 2

If you don't want to call getTime() just try this:

(a >= b && a <= b)