Functions for Date & Time

Get date

function GetDate() {
	var date = new Date();
	if ((date.getYear() - 100) < 10) {
		var year = "0" + new String((date.getYear() - 100));
	}
	else {
		var year = new String((date.getYear() - 100));
	}
	var dateString = (date.getMonth() + 1) + "/" + date.getDate() + "/" + year + " " + date.getHours() + ":" + date.getMinutes() + ":" + date.getSeconds();
	return dateString;
}

Change time by Peter Kahrel

The function's first parameter is a string specifying the number of hours to add or subtract, the second parameter indicates the clock type, 12 or 24 hrs. Sample calls:
change_time ("-1", 24); // subtract 1 hour, using a 24-hr clock
change_time ("+3", 12); // add 3 hours using a 12-hr clock

function change_time (n, clocktype)
    {
    app.findGrepPreferences = null;
    app.findGrepPreferences.findWhat = '\\d\\d?(?=:\\d\\d)';
    var hr, hours = app.documents[0].findGrep();
    for (var i = hours.length-1; i > -1; i--)
        {
        hr = eval ("Number(hours[i].contents)" + n);
        if (hr >= clocktype)
            hr = hr - clocktype;
        else
            if (hr < 0)
                hr = clocktype-Math.abs(hr);
        hours[i].contents = String (hr);
        }
    }

change_time ("-1", 24);

Current time

alert(currentTime());

function currentTime() {
var date = new Date();
var str = '';
var timeDesignator = ' T';
function _zeroPad(val) { return (val < 10) ? '0' + val : val; }
str = (date.getFullYear() + '-' +
	   _zeroPad(date.getMonth()+1,2) + '-' +
	   _zeroPad(date.getDate(),2));
str += (timeDesignator +
		_zeroPad(date.getHours(),2) + ':' +
		_zeroPad(date.getMinutes(),2) + ':' +
		_zeroPad(date.getSeconds(),2));
return str;
};

Get duration

function GetDuration(startTime, endTime) {
	var str;
	var duration = (endTime - startTime)/1000;
	duration = Math.round(duration);
	if (duration >= 60) {
		var minutes = Math.floor(duration/60);
		var seconds = duration - (minutes * 60);
		str = minutes + ((minutes != 1) ? " minutes, " :  " minute, ") + seconds + ((seconds != 1) ? " seconds" : " second");
		if (minutes >= 60) {
			var hours = Math.floor(minutes/60);
			minutes = minutes - (hours * 60);
			str = hours + ((hours != 1) ? " hours, " : " hour, ") + minutes + ((minutes != 1) ? " minutes, " :  " minute, ") + seconds + ((seconds != 1) ? " seconds" : " second");
		}
	}
	else {
		str = duration + ((duration != 1) ? " seconds" : " second");
	}

	return str;
}

Prototype for Date function

Date.prototype.dayName = function() {  
    var myDay = ['Sunday','Monday','Tuesday','Wednesday','Thursday','Friday','Saturday'];  
    return myDay[this.getDay()];  
}  
  
Date.prototype.monthName = function() {  
    var myMonth = ['January','February','March','April','May','June','July','August','September','October','November','December'];  
    return myMonth[this.getMonth()];
}
   
var myToday = new Date;  
alert((myToday.dayName() + ', ' + myToday.getDate() + ' ' + myToday.monthName() + ', ' + myToday.getFullYear()));

function getFormattedDateString

Returns a formatted String

function getFormattedDateString(date, addTime) {
    if (addTime) {
        return date.getFullYear() + "-" + pad(date.getMonth() + 1, 2) + "-" + pad(date.getDate(), 2) + "_" + pad(date.getHours(), 2) + "-" + pad(date.getMinutes(), 2) + "-" + pad(date.getSeconds(), 2);
    }
    else {
        return date.getFullYear() + "-" + pad(date.getMonth() + 1, 2) + "-" + pad(date.getDate(), 2)
    }
}