How to check if one DateTime is later than another in javascript

Question

Through the form i am getting two values like

   Start datetime = '01/12/2013 12:00:00 AM' and    End datetime = '02/12/2013 12:00:00 AM'. 

How I can validate the start datetime must be less than end datetime in javascript?

Answer 1

Asuming you received a date in Javascript Date format you need Date.parse() function or compare by comparison operators. It will return the milliseconds that have passed since 01/01/1970 00:00

Somehow like this:

if(Date.parse(datetimeStart) < Date.parse(datetimeEnd)){    //start is less than End }else{    //end is less than start } 

Here is a Fiddle

Answer 2

its really simple in javascript

var startTime = new Date('01/12/2013 12:00:00 AM'); var endTime = new Date('02/12/2013 12:00:00 AM'); 

and then all you need to do is compare

if( startTime < endTime){    alert("start time is lesser"); } 

More on this here