Solved

Calculate date difference in YMD format "20081008"

Posted on 2008-10-30
365 Views
On a submit page, I have 2 Select's - startdate, enddate.
Each holds a calculated value and allows the user to select a startdate and a enddate, submit the form and retrieve data.

Now I need to verify the form before submitting it, that startdate < enddate AND the difference between the dates are <= 4 weeks/31 days.

The function I've made so far is below - but I need osme help on how to verify the max. date difference.

Cheers,
Mark

``````function valiDates(){
var maxtime = 60*60*24*31;
var btn = document.getElementById("submit");
var strSd = document.getElementById("startdate").value;
var strEd = document.getElementById("enddate").value;
var sd = new Date( strSd.substring(0,3) +"/"+ strSd.substring(4,5) +"/"+ strSd.substring(6,7) );
var ed = new Date( strEd.substring(0,3) +"/"+ strEd.substring(4,5) +"/"+ strEd.substring(6,7) );
if (sd > ed ){
btn.disabled = true;
btn.value = 'Slut dato skal være senere end start dato, max 4 uger statistik kan dannes !';
} else {
btn.disabled = false;
btn.value = 'Hent data';
}
}
``````
0
Question by:trg_dk
[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

LVL 1

Accepted Solution

1eEurope earned 500 total points
ID: 22839385
``````//Set 1 day in milliseconds
var one_day=1000*60*60*24;

//Calculate difference btw the two dates, and convert to days
var dif = Math.ceil((ed.getTime()-sd.getTime())/one_day);

if(dif > 31) {
btn.disabled = true;
btn.value = '...!';
}
``````
0

LVL 2

Author Closing Comment

ID: 31511589
YOU da' man :-)

Thanks for your quick solution - works perfectly !!!
0

Featured Post

Question has a verified solution.

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

In this article, we'll look how to sort an Array in JavaScript, including the more advanced techniques of sorting a collection of records either ascending or descending on two or more fields. Basic Sorting of Arrays First, let's look at the …
This article describes a JavaScript program that creates a maze made of hexagonal cells.  In Part 2 (http://www.experts-exchange.com/Programming/Languages/Scripting/JavaScript/A_7850-Hex-Maze-Part-2.html), we'll extend the program by adding a depth-…
The viewer will learn the basics of jQuery, including how to invoke it on a web page. Reference your jQuery libraries: (CODE) Include your new external js/jQuery file: (CODE) Write your first lines of code to setup your site for jQuery.: (CODE)
The viewer will learn the basics of jQuery including how to code hide show and toggles. Reference your jQuery libraries: (CODE) Include your new external js/jQuery file: (CODE) Write your first lines of code to setup your site for jQuery…
Suggested Courses
Course of the Month11 days, 8 hours left to enroll