Web, html, javascript,
Hi,
I need to calculate the time since this .htm file was last modified. {which I can then use in a calculation, rather than display, so days&decimals format would be OK}
I can get the time NOW, but I am having trouble understanding the format/content of the
document.lastModified field.
Any help would be much appreciated - thanks
I have a function to calculate the difference between the 2 dates, but when i run it I get:
Object doesn't support this property or method - <script language="JavaScript" type="text/javascript">
-
<!--
-
function days_between(date1, date2) { //calculates day & fractions of days between 2 dates_times
-
-
var ONE_DAY = 1000 * 60 * 60 * 24 // Nb The number of milliseconds in one day
-
// Convert both dates to milliseconds
-
var date1_ms = date1.getTime()
-
var date2_ms = date2.getTime()
-
-
// Calculate the difference in milliseconds
-
var difference_ms = Math.abs(date1_ms - date2_ms)
-
-
// Convert back to days&decimals and return
-
// return Math.round(difference_ms/ONE_DAY) // forget about rounding
-
return (difference_ms/ONE_DAY)
-
}
-
-
//-->
-
</script>
-
And to get the 2 dates I am using:
- <script type="text/javascript">
-
<!--
-
var current_date = new Date()
-
-
document.writeln("Current time: " + current_date + "<p />") // print for testing
-
-
lastmod = document.lastModified // get string of last modified date
-
lastmoddate = Date.parse(lastmod) // convert modified string to date
-
if(lastmoddate == 0){ // unknown date (or January 1, 1970 GMT)
-
document.writeln("Last Modified: Unknown")
-
} else {
-
document.writeln("Last Modified: " + lastmod + "<p />")
-
-
// Call the days_between function
-
var time_elapsed = days_between(current_date, lastmod )
-
// and for testing just print it for now..
-
document.writeln("Time elapsed =: " + time_elapsed + "<p />")
-
}
-
//-->
-
</script>
-
