time object functions in javascript.
//js time object
//returns the milisecond difference between two times
function subtimes(time1, time2) {
var difference = time2.getTime() - time1.getTime();
return difference;
}
//returns the sum of miliseconds between two times.
function addtimes (time1, time2) {
var sum = time1.getTime() + time2.getTime();
return sum;
}