?
Solved

Javascript countdown timer

Posted on 2009-03-29
3
Medium Priority
?
283 Views
Last Modified: 2012-05-06
I'm trying to create a countdown timer in javascript for a web page.  Everything appears to be working correctly except for the seconds. I think it must be my calculation, but I don't know what else to try. Can  anyone see where I'm going wrong?
function calculate()
{
	//load dates
	var startDate = new Date()
	var endDate = new Date("May 19, 2009, 21:00:00")
	
	//load variable
	var secPerYear = 60*60*24*365;
	var secPerDay = 60*60*24;
	var secPerHour = 60*60;
	var secPerMin = 60;
	
	//seconds left right now
	var seconds = (endDate.getTime() - startDate.getTime()) / 1000
	
	//get years left value
	var years = Math.floor(seconds / secPerYear)
	
	//remove seconds from year
	seconds = seconds - (years * secPerYear)
	
	//get day value
	var days = Math.floor(seconds / secPerDay)
	
	//remove seconds from day
	seconds = seconds - (days * secPerDay)
	
	//get hours value
	var hours = Math.floor(seconds / secPerHour)
	
	//remove seconds from hours
	seconds = seconds - (hours * secPerHour)
	
	//get minutes
	var minutes = Math.floor(seconds / secPerMin)
	
	//remove seconds from minutes
	seconds = seconds - (seconds * secPerMin)
		
	seconds = (seconds / 1000);
	
		
	lblYears.innerHTML = years
	lblDays.innerHTML = days
	lblHours.innerHTML = hours
	lblMinutes.innerHTML = minutes
	lblSeconds.innerHTML = seconds

Open in new window

0
Comment
Question by:98fatboyrider
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
3 Comments
 
LVL 31

Assisted Solution

by:Frosty555
Frosty555 earned 800 total points
ID: 24013712
Everything looks fairly sound, but I think your last line:

seconds = (seconds / 1000);

Isn't necessary. Your seconds are already in seconds, you shouldn't need to divide by 1000 again.
0
 
LVL 15

Assisted Solution

by:fsze88
fsze88 earned 1200 total points
ID: 24019503
you can try this, much more simplified
<script type="text/javascript">

        var startDate = new Date()
        var endDate = new Date("May 1, 2009, 22:50:00")
        var differentDate;
        differentDate = new  Date(endDate - startDate);
        document.write("differentDate.getSeconds() : " + differentDate.getSeconds() + "<br/>" );
        document.write("differentDate.getMinutes() : " + differentDate.getMinutes() + "<br/>" );      
        document.write("differentDate.getHours() : " + differentDate.getHours() + "<br/>" );      
        document.write("differentDate.getDate() : " + differentDate.getDate() + "<br/>" );      
        document.write("differentDate.getMonth() : " + (differentDate.getMonth()-1) + "<br/>" );      
        document.write("differentDate.getFullYear() : " + differentDate.getFullYear() + "<br/>" );      
</script>
0
 

Accepted Solution

by:
98fatboyrider earned 0 total points
ID: 24068334
Turns out it was a calculation error at line 38. I should have been multiplying by minutes, not seconds. Once that was working, I rounded the result to trim the milliseconds. Thanks for the help.
function calculate()
{
	//load dates
	var startDate = new Date()
	var endDate = new Date("May 12, 2009, 21:00:00")
	
	//load variables
	var secPerYear = 60*60*24*365;
	var secPerDay = 60*60*24;
	var secPerHour = 60*60;
	var secPerMin = 60;
	
	//seconds left right now
	var seconds = (endDate.getTime() - startDate.getTime()) / 1000
	
	//get years left
	var years = Math.floor(seconds / secPerYear)
	
	//remove seconds from year
	seconds = seconds - (years * secPerYear)
	
	//get days
	var days = Math.floor(seconds / secPerDay)
	
	//remove seconds from day
	seconds = seconds - (days * secPerDay)
	
	//get hours value
	var hours = Math.floor(seconds / secPerHour)
	
	//remove seconds from hours
	seconds = seconds - (hours * secPerHour)
	
	//get minutes
	var minutes = Math.floor(seconds / secPerMin)
	
	//remove seconds from minutes
	seconds = seconds - (minutes * secPerMin)
	
	seconds = Math.round(seconds) -1
	
	lblYears.innerHTML = years
	lblDays.innerHTML = days
	lblHours.innerHTML = hours
	lblMinutes.innerHTML = minutes
	lblSeconds.innerHTML = seconds
}

Open in new window

0

Featured Post

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Color can increase conversions, create feelings of warmth or even incite people to get behind a cause. If you want your website to really impact site visitors, then it is vital to consider the impact color has on them.
Ready to get certified? Check out some courses that help you prepare for third-party exams.
This tutorial walks through the best practices in adding a local business to Google Maps including how to properly search for duplicates, marker placement, and inputing business details. Login to your Google Account, then search for "Google Mapmakerā€¦
The viewer will learn how to dynamically set the form action using jQuery.
Suggested Courses

764 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question