Difrence between 2 times/date

[nezbo]

Hi all

 

I am trying to get the difrence between 2 date in both decimal format and time format and useing innerHTML post it back to the page.

 

The porblem i cam getting is that the value is not coming back correctly

 

var StartHours = ((StartTimesHoursMin1 < 1000) ? "0" : "") + StartTimesHoursMin1;
				var StartHours1 = StartHours.substring(2,0);
				var StartMins1 = StartHours.substring(4,2);

				var EndHours = ((EndTimesHoursMin1 < 1000) ? "0" : "") + EndTimesHoursMin1;
				var EndHours1 = EndHours.substring(2,0);
				var EndMins1 = EndHours.substring(4,2);


				var curStartTime = new Date(StartYears1,StartMonth1,StaryDays1,StartHours1,StartMins1,00);
				var curEndTime = new Date(EndYears1,EndMonth1,EndDays1,EndMins1,EndHours,00);

				var one_day=60*60*24*365;

				//var curDateTime = Math.ceil((curStartTime.getTime()-curEndTime.getTime())/(one_day));

				document.write(((curEndTime.getTime()-curStartTime.getTime())/(one_day)))

				var curHour = curDateTime.getHours()
				var curMin = curDateTime.getMinutes()
				var curTime = ((curHour < 10) ? "0" : "") + curHour + ":" + ((curMin < 10) ? "0" : "") + curMin;

				var decimalTime = (curHour + curMin/60);

				document.getElementById("theIHours").value = decimalTime;
				document.getElementById("hoursANDMins").innerHTML = curDateTime;

 

I am not to sure where i have gone wrong.

 

Please Help

Nezbo

[Psycho]

Assuming you have your start and end dates as data objects, I have a function that will give you the difference in days, hours, minutes, etc:

//****************************************************************//
// FUNCTION: dateDiff(Date1Obj, Date2Obj, [units], [precision])   //
//                                                                //
// Returns the difference between two date objects in the units   //
// specified (optional, default is days). The optional precision  //
// parameter determines the number of decimal places the result   //
// will be rounded to. Note: When the 'days' units is used the    //
// precision is not applicable (will determine the difference in  //
// calendar days).                                                //
//                                                                //
// The units parameter can include the following: d=days,         //
//      h = hours, m = minutes, s = seconds, ms = milliseconds    //
//****************************************************************//
function dateDiff(date1Obj, date2Obj, units, precision) {

  //set the default untis
  var units = (units)?units:'d';
  var precision = (precision && units!='d')?Math.pow(10, precision):1;

  //Calculate the units divisor
  switch (units) {
    case 'ms': //Milliseconds
      var units = 1;
      break;
    case 's': //Seconds
      var units = 1000;
      break;
    case 'm': //Minutes
      var units = 1000 * 60;
      break;
    case 'h': //hours
      var units = 1000 * 60 * 60;
      break;
    case 'd': //Calendar Days
      var units = 1000 * 60 * 60 * 24;
      //Normalize time to 12:00am to count calendar days
      date1Obj.setHours(0); // = new Date(Date1Obj.getFullYear(), Date1Obj.getMonth(), Date1Obj.getDate());
      date2Obj.setHours(0); // = new Date(Date2Obj.getFullYear(), Date2Obj.getMonth(), Date2Obj.getDate());
      break;
  }

 

If you have hours in a decimal format, it would be fairly simple to reformat in an hh:mm format:

function decToHours (hoursInDec)
{
    var minsInt = Math.round(hoursInDec * 60);
    var hours = Math.round(minsInt/60);
    var mins = (minsInt - (hours * 60));
    mins = (mins<10) ? '0'+mins : mins;
    return (hours+':'+mins);
}