Difference Between Two Date

I want to asking about how to get a date difference in javascript :

example :

Let say we have two textbox, the first one we call start date and the second one we call last date.

start date contain data 2006-11-06 08:20:21 and last date contain 2006-11-10 09:10:21.

How can we get the value of 4 days between those data in the textbox...

Thank You very much for your answer...;)

To literally get the number of days between those two date time values, you would do this:

Code:

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(new Date(2006,11,10,9,10,21).getTime()-new Date(2006,11,6,8,20,21).getTime())/(1000*60*60*24)

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Of course, that works out to:

4.034722222222222 days

So you could use the Math.round() method:

Code:

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Math.round((new Date(2006,11,10,9,10,21).getTime()-new Date(2006,11,6,8,20,21).getTime())/(1000*60*60*24))

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which will give you 4 in this case. Alternatively, you could omit the H,M,S to begin with:

Code:

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(new Date(2006,11,10).getTime()-new Date(2006,11,6).getTime())/(1000*60*60*24)

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which will also give you 4 in this case. However, if it was really closer to 3 or 5 days, you no longer can tell that.

For flat rate per day charges with no allowance for partial days, for example, use Math.ceil() method:

Code:

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Math.ceil((new Date(2006,11,10,9,10,21).getTime()-new Date(2006,11,6,8,20,21).getTime())/(1000*60*60*24))

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which works out to 5 in this same case.

Finally, if partial days do not count, even if they consist of 23 hours, 59 minutes and 59 seconds - use Math.floor().