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Thread: JAVASCRIPT DATE DIFFERENCE PROBLEM

  1. #1
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    Exclamation 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...


  2. #2
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    Default Re: JAVASCRIPT DATE DIFFERENCE PROBLEM

    Java and Javascript are quite different. Try doing a search on "Javascript forum" and you'll find a plethora of forums which may be able to better answer your question (unfortunately, I don't know too much about good Javascript forums, though StackOverflow is a very good site for pretty much anything programming related).

  3. #3
    Think of me.... Mr.777's Avatar
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    Default Re: JAVASCRIPT DATE DIFFERENCE PROBLEM

    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();

  4. #4
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    Default Re: JAVASCRIPT DATE DIFFERENCE PROBLEM

    Please note that this is a Java forum and not a JavaScript forum.

    I have moved this thread to - Other Programming Languages

    This in no way guarantees a valid answer though. The Other Programming Languages forum is a dump for threads like these.
    Please use [highlight=Java] code [/highlight] tags when posting your code.
    Forum Tip: Add to peoples reputation by clicking the button on their useful posts.

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