Thread: JAVASCRIPT DATE DIFFERENCE PROBLEM

First of all, sorry if this post is in wrong forum. I could not find a forum here for js. so posting it here. My problem is that i've written a js function to find the difference between two dates. the format being used is dd/mm/yyyy hh:mm. The function returns correct value when give one set of values, but go wrong with another set. examples are given below.

set 1 : Time 1 = 24/02/2011 09:30 , time 2 = 24/02/2011 16:00

Output is corret here. It gives 6 Hours & 30 Minutes (after converting the difference)

set 2: Time 1 = 24/02/2011 09:30 , time 2 = 25/02/2011 16:00

Here, it gives 31 days, 6 Hours & 30 Minutes. My code is given below. Also the alert of dates display strange values. Don't know if it is timezone issue. I wonder what is going wrong here

function compareDateTime(frmtime,totime)
{
	var date1 = new Date(frmtime);
	var date2 = new Date(totime);
	var diff = new Date();
	alert(date1);
	alert(date2);
	diff = (date2.getTime()-date1.getTime());
	if (diff<0)
	{
		alert("From Time cannot be later than To Time!");
		return 0;
	}
	else if (diff==0)
		{
			alert("From Time cannot be equal with To Time!");
			return 0;
		}
 
	else
	{
		return diff;
	}
}

The returned diff value is broken down as following:

if (diff>0)
	{
		days = Math.floor(diff / (1000 * 60 * 60 * 24));
 		diff -= days * (1000 * 60 * 60 * 24);
 		hours = Math.floor(diff / (1000 * 60 * 60));
 		diff -= hours * (1000 * 60 * 60);
 		mins = Math.floor(diff / (1000 * 60));
 		alert(days+","+hours+","+mins);
		return true;
	}

Please Help...

Your second part of code is not correct. And you have made it too difficult to understand. Why don't you try simple like;

HTML Code:

var minutes=1000*60;
var hours=minutes*60;
var days=hours*24;
var years=days*365;
var d=new Date();
var t=d.getTime();