hey everyone!
I am trying to calculate the difference between two dates which are inputted into textboxes.
GetDate(); loads an in-line calendar while duration() is supposed to work out the difference and write it to a third textbox.
This is the Javascript I am using to try and work it out:
but the duration isn't updating at all!
Here is another function I tried which doesnt seem to work:
I am trying to calculate the difference between two dates which are inputted into textboxes.
HTML:
Start Date: <input name="start_date" type="text" id="start_date" onClick="GetDate(start_date);" onChange="duration();">
End Date: <input name="end_date" type="text" id="end_date" onClick="GetDate(end_date);" onChange="duration();">GetDate(); loads an in-line calendar while duration() is supposed to work out the difference and write it to a third textbox.
This is the Javascript I am using to try and work it out:
Code:
function days_between(date1, date2) {
var ONE_DAY = 1000 * 60 * 60 * 24
var date1_ms = date1.getTime()
var date2_ms = date2.getTime()
var difference_ms = Math.abs(date1_ms - date2_ms)
return Math.round(difference_ms/ONE_DAY)
}
function duration() {
var from_date = document.getElementById('start_date').value
var to_date = document.getElementById('end_date').value
var duration = days_between(from_date, to_date)
document.getElementById('duration').value = duration
}but the duration isn't updating at all!
Here is another function I tried which doesnt seem to work:
Code:
var day1, day2;
var month1, month2;
var year1, year2;
value1 = form1.start_date.value;
value2 = form1.end_date.value;
day1 = value1.substring (0, value1.indexOf ("/"));
month1 = value1.substring (value1.indexOf ("/")+1, value1.lastIndexOf ("/"));
year1 = value1.substring (value1.lastIndexOf ("/")+1, value1.length);
day2 = value2.substring (0, value2.indexOf ("/"));
month2 = value2.substring (value2.indexOf ("/")+1, value2.lastIndexOf ("/"));
year2 = value2.substring (value2.lastIndexOf ("/")+1, value2.length);
date1 = year1+"/"+month1+"/"+day1;
date2 = year2+"/"+month2+"/"+day2;
firstDate = Date.parse(date1)
secondDate= Date.parse(date2)
msPerDay = 24 * 60 * 60 * 1000
dbd = Math.round((secondDate.valueOf()-firstDate.valueOf())/ msPerDay) + 1;
document.getElementById('duration').value = dbd
